Cerebral hernia
The
size and structure of the crest of polands
New varieties of Polish bantams originating in the USA
At first
sight the Polands looks as a complex chicken; time consuming and fragile. This
is not true, since Polands are like normal chickens in a coop.
Polands are very friendly chickens and the
full crest is no obstacle for the bird. The white feathers in the crest of non
bearded Polands are more soft than the crest of bearded Polands. Both types can
range free in a garden as long as it does not rain. It is a nice look to see the
birds room in the garden. The advantage of free range is that the chickens know
what is best for them, like weeds and insects, which is good for the fertility.
A covered coop is nevertheless necessary for these birds in case of rain. They
can stand the cold without a problem.
During the breeding season we cut a few feathers around the eyes. In that
respect these crested birds have a better sight.
Let us look upon the White Crested Black Polish. They are the birds upon the lawn.
They are the big white plumed crests borne on each cock and hen, and the rest of their plumage is a greenish black of lustrous splendour. Surely so marvellous a fowl can never pass into nothingness; surely it will survive to make glad the hearts of fanciers as long as fowls remain one of our domesticated species. It is not contented that the utility of the Polish is as good as that of production-bred fowls; but eggs are not the only product of chickens. There is another product. It is less tangible but not less necessary to our existence. It is a product that love and dreams and poetry are made of.
It is such a product that the Black Polish with the White Chrysanthemum – like crest yields to those who breed it.
(G. Brenneman, 1977)
Small pens
may be nice looking, but are often too humid in winter and too hot in summer,
which easily leads to lice and the like. The crest is an ideal place for lice,
because the birds can not clean it themselves.
Polands also need special drinkers. Their
crest might get wet, which should be prevented. Drinkers, so-called upside down
buckets, prevent the crests getting wet.
Feedstuff can be bought in specialized shops, which is mostly balanced. Some
breeders mix their own feedstuff, depending on their preference or
possibilities. However, it is useful to throw some feedstuff in the coop to
prevent that the chickens get bored, like vegetables and weeds.
Breeders of fowls the world over has reported a condition that seems peculiar to crested breeds, particularly birds with heavier crests than others. The onset of the condition is described as a wobble in the head which can increase in severity to the point where the head twists right around and that bird in some cases looses its balance and mobility altogether. This is commonly called ‘cerebral hernia’. The Victorian Institute of Animal Science has conducted post mortems on breeds such a polish and silkies over the years and confirms the existence of a mutation connected with the gene for a dominant crest. A mutation is a genetic copying error or mistake that occurs when the DNA from the parent bird’s meet and divide incorrectly in what is known as meiosis. The skull of a crested fowl is unique. Unlike other breeds, it is dome like in structure and in heavily crested chicks; there is a tendency for the skull to be underdeveloped. Like the fontanels of a human baby, the skull of crested fowls has openings. These are supposed to fuse in the normal way and usually do. However, this does not always occur and the result is exposure of the cerebellum (brain). Subsequently, a bird’s brain space remains venerable to the environment. Certain bloodlines seem more predisposed to this condition, whereas other are seldom affected. Unsurprisingly, it is rare in adult birds, as their skulls have had the time to grow and fuse over. It is more prevalent with young birds between 1 and 4 months of age.
Conditions observed and
possible causal factors.
There are a variety of causal
factors and distinct conditions each of which can display the symptoms
described above.
Type one.
Cerebral trauma or
brain damage can actually happen to any young bird of any breed. It
involves direct impact (ie a peck on the head) resulting in brain
damage. Crested breeds could fare worse in such a situation. The brain
is forced by the pressure of the impact and can ‘herniated’, swell
or ooze out through the cranium.
Type two
Cerebral oedema or
swelling of the cerebellum is an internal reaction to the environment
and can occur in at least two ways. Firstly, as a response to hot
weather and change, an excess of fluid builds up as in the brain cavity,
placing pressure on the centers of the brain, which govern mobility. The
bird experiences vertigo (spinning sensation) and consequently loses its
sense of balance. If left untreated this can lead to permanent brain
damage. On occasion birds may recover and live with a permanent, but
slight head wobble, continuing to eat and live with certain normality.
Secondly, same symptoms can occur with a respiratory condition. The
immune system can respond to the invasion of bacteria or a virus by
producing more fluid with similar results.
Treatment
A) Prevention is
better than cure. By ensuring that your birds are vaccinated and well
managed the breeder can keep disease challenge to a minimum and avoid
the third scenario. Identifying bloodlines that have this propensity and
breeding away will help avoid heartbreak. Controlling temperature in
extremes of weather can prevent this condition to some degree and
ensuring that no foreign objects pose a threat to the birds’ welfare
(ie checking perches, feeders etc are secure are all good preventative
measures).
B) Cure
- there is no guaranteed cure if you have a bird with the condition.
However, a vet friend administered an intramuscularly injection of
cortisone with positive results. In this case the drug reduced the
inflammation/swelling and the bird recovered.
Other breeders have found that administering broad -based antibiotics
have worked. The problem is that without a postmortem, you cant always
isolates the cause. By then it is probably too late anyway. At the
earliest detection of the condition I would use both cortisone and
Baytril (antibiotic) to cover my bases. The longer a bird is left
untreated, the harder it is to achieve recovery. Fortunately, the
problem is not common. Edan Montgomery claimed that out of over 600
birds bred last year, about 5-6 developed the condition. Sadly, it is
usually the heavily crested ‘potential champs’.
By hatching in large numbers, line breeding rather than close in
breeding and practicing good management techniques, this condition is
largely avoidable. Every breed has its hiccups. For crested breeds, this
is one of them.
On a positive note, the rewards of producing a champion far outweigh the
occasional disappointment linked with this condition. It also goes to
show the largely detrimental nature of mutations. They are rarely if
ever an advantage!
By Peter Jones
The size and structure of the crest of Polands
VIEW ON VISION
Polands have a large crest. This can hinder the vision of
these birds, which should be prevented. In the last decades the size of
the crests has been bred larger and larger by the fanciers, encouraged
by the prizes which could be won at exhibitions. Even more so the
structure of the crests became more loose, which went to the detriment
of visibility of the Polands.
Not only fanciers became more critical but also the public discussion on
well-being of animals made some Poland Clubs in Europe, notably in
Germany, Switzerland and the Netherlands, aware of the necessity to
agree on the maximum size of the crests of Polands.
Within the Dutch Poland Club a lengthy discussion took place on the size
and structure of the crest and the required amendments to the Standard
description of Polands. In 1999 this led to a booklet of the Dutch
Poland Club "View on Vision". In 2000 the Standard has been
changed in line with the proposals of the Dutch Poland Club. Below a
small summary of this booklet with illustrative pictures of poultry
judge and Poland breeder Henk Timmer.
The discussion focusses on three topics:
The size and structure of the crest
The size should be in harmony with the body of the bird. Also it must be densely feathered with good visisbility for the bird. This means that Polands must be able to look straight ahead and at both sides, to be judged at eye level.
Pictures 1 to 4 illustrate the relationship between skull and crest. If the skull is too wide and too low the crest falls for the eyes, and can even cause inflammation on the eyes. Ideally the skull is high, with the form of a cylinder. In general one can say, the higher the better. The basis of the skull should be as broad as the top. Breeders should exclude Polands with a small basis of the skull.

fig.
1
fig.
2
fig.
3
fig. 4
Breeders of Polands are advised to breed only with
Polands with the right skull. Furthermore the feathering of the skull
should be dense.
Illustration 6 shows a good skull and 7 a poor skull.

fig.
5
fig.
6
fig. 7
Preparing Polands for shows
In the Netherlands it used to be common practise to cut
the coloured feathers of the crests of Polands (see picture 8). In that
way the crests seemed fully white. However, the coloured feathers
(mostly black) are important for the sight of the birds. These coloured
feathers are socalled supporting feathers; they support the other
feathers to keep the crest upright. The same applies to the coloured
feathers above the eyes.
So, for these reasons the Dutch breeders changed the rules, i.e. the
coloured feathers should stay, but may be cut modestly.
How should it be conditioned?
When cutting the coloured feathers we work from the back of the crest to
the front. Coloured feathers in the middle of the crest can be cut close
to the skin. In the front of the crest the feathers can also be cut,
apart from the last rows. In that way a nicely cut crest will appear.
See illustrations 8 to 10.

fig.
8
fig.
9
fig. 10
As you may understand implementing changes takes time.
This applies to the way the crests are cut for shows, but certainly for
breeding Polands with the right skull and crests to get the necessary
natural sight of our Polands. The Dutch Poland Club hopes to achieve
this in 5 years time.
The last things we want is birds which can not see. After all we all
want the best for our Polands!
Luuk Hans
In recent times
various times research has been done to the vulnerability of Dutch breeds. Not
only had we investigated the rareness of our (poultry) breeds, but also their
genetic resources. In this research we got also more insight in the situation of
Polands.
We know from qualitative research that Polands are rare everywhere in the world.
The Dutch example might give you an idea of further research and wonder how the
situation is in your country.
Background
The
first research has been done in 2001 with an investigation among all clubs of
small animal breeds, like poultry, pigeons, waterfowl and rabbits of Dutch
origin. All clubs have responded!
Non- bearded Polands, large fowl, 2005
| Colour | Total number breeding stock | Female | Male | Number of breeders |
| WC Black | 52 | 40 | 12 | 5 |
| WC White | 25 | 20 | 5 | 3 |
| WC Blue | 8 | 5 | 3 | 2 |
| WC Cuckoo | 14 | 10 | 4 | 2 |
| WC Mottled | 14 | 10 | 4 | 2 |
| BC White | 47 | 40 | 7 | 2 |
| Total | 160 | 125 | 35 | 10 |
Questions raised where among others; how many birds are used a breeding strain, how many colours, how many breeders. This estimate gave a good insight in the situation of Polands.
The situation of
large Polands.
Difference is made between bearded and non-bearded Polands. Large are in general
less popular than bantams, also due the space breeders have in the Netherlands.
No account has been taken of the frizzle variety, nearly non existent since the
creator, Arie Boland, died.
Bearded Polands, large fowl, 2005
| Colour | Total number breeding stock | Female | Male | Number of breeders |
| Self Black | 19 | 15 | 4 | 3 |
| Self White | 30 | 20 | 10 | 3 |
| Self Blue | 7 | 5 | 2 | 2 |
| Cuckoo | 7 | 5 | 2 | 2 |
| Silver laced | 14 | 10 | 4 | 3 |
| Gold laced | 14 | 10 | 4 | 3 |
| Buff laced | 14 | 10 | 4 | 3 |
| Tollbunt | 14 | 10 | 4 | 1 |
| Total | 105 | 75 | 30 | 8 |
(note; since Tollbunt was not recognized at the time of research this colour has been left out of the statistics)
Both breeds, bearded and
non-bearded, can be qualified as rare. You have to keep in mind that breeds are
considered rare, according to the FAO, if there is less than 1000 breeding
stock! The situation is not much better in other countries.
|
Breed |
Show season 1979 |
Showseason 1985 |
Research 2005 |
|
Poland, non-bearded |
23 |
18 |
10 |
|
Poland bearded |
15 |
14 |
8 |
From previous research,
looking at the number of exhibitors at shows, we can judge that the number of
exhibitors has halved in 20 years time!
The situation of Poland
bantams
The situation for bantams is slightly better than for the large ones. Even so,
we see more colours at shows of W.C. bantams, like mottled, blue and cuckoo.
Having said that, we must conclude that the W.C. Black is most prominent.
Poland bantams, non-bearded, 2005
|
Colour |
Total number breeding stock |
Female |
Male |
Number of breeders |
|
WC Black |
105 |
80 |
25 |
15 |
|
WC White |
30 |
20 |
10 |
3 |
|
WC Blue |
14 |
10 |
4 |
3 |
|
WC cuckoo |
14 |
10 |
4 |
3 |
|
WC Mottled |
14 |
10 |
4 |
2 |
|
BC White |
13 |
10 |
3 |
1 |
|
WC Buff |
14 |
10 |
4 |
2 |
|
Total |
200 |
150 |
50 |
20 |
(Note; buff, khaki and chocolate have been left out of the statistics since these colours where not recognized at the time of the research.)
In the last years we have witnessed more interest in the laced varieties. Buff laced is still the most popular colour for many years already, silver laced and gold laced become more popular.
Poland bantams, bearded, 2005
|
Colour |
Total number breeding stock |
Female |
Male |
Number of breeders |
|
Self Black |
20 |
15 |
5 |
3 |
|
Self White |
14 |
10 |
4 |
3 |
|
Self Blue |
14 |
10 |
4 |
2 |
|
Self cuckoo |
13 |
10 |
3 |
2 |
|
Silver laced |
21 |
15 |
6 |
5 |
|
Gold laced |
21 |
15 |
6 |
5 |
|
Buff laced |
62 |
50 |
12 |
10 |
|
Total |
165 |
125 |
40 |
15 |
What now?
Important is to mobilize potential new breeders and fanciers. That is difficult and is contrary to the demographic developments; smaller housing, more leisure, less tolerance (crowing!) and so on. More cooperation and communication is necessary. And your ideas!
By Al Westling
I consider it an honour to have been asked by my friend, Luuk Hans from the
Netherlands, to reveal the origin of chocolate and khaki Polish bantams, here in
Kansas, in the heart of the USA. I am happy to comply.
I had been a pigeon fancier for many years before taking up the breeding of
Polish bantams. In 1985, the very first year I had my WC blacks started, the
well known dr. W..F. Hollander said he and a co-worker in genetics had
discovered and classified a new gene that had been discovered in the Araucana
breed[1].
They named it ‘dun’, because it was much like the dun in pigeons, a dark brown.
It was incomplete dominant over black. So a pure dun mated to black would
produce brown chicks. The colour would eventually be admitted to the Standard of
Perfection as ‘chocolate’.
The original hen from Hollander was not a true bantam in size, really large. She
was similar to a buff Columbian hen, but with her dark markings were brown (dun)
instead of black. To get the size down I mated her to a black Rosecomb male.
They gave me a nice solid dun pullet with a pea comb, which laid greenish eggs.
Of course I used my best WC black Polish bantam male with her to get crests
started and kept only the duns for breeding. By the time I had them 7/8 Polish
with white crests, I showed one male. This would have been 1988, I believe.
Three judges handled him at three different shows. One said it was a poor
coloured dark blue. One looked at the coop tag and remarked that we had no such
color as ‘dun’. It was the Dean of the American judges, Eugene Barnard, who said
“We have a new variety of Polish”. He later complimented me for the
accomplishment.
For several years I used my best WC blacks to the WC duns and when the duns were
as good as my blacks I eagerly mated my best dun cock to the best dun hen and
got exactly what I wanted; a really good khaki male! This was in 1990, and the
beginning of yet another variety. The khaki’s are pure duns and when mated khaki
x khaki they will breed true. The chocolates have one black gene and one dun
gene, thus when mated they can produce khaki’s, chocolates and blacks. You will
notice that I am now calling the duns ‘chocolates’, the name they have been
standardized with.
Chocolates of both sexes are dark brown and some are so dark as to be mistaken
for blacks if in poor light. The khaki females should be light tan all over. The
khaki male should have a light tan body with male feathers on hackle, back and
tail a shade darker, then a patch of medium chocolate on the wing bows which is
partially obscured by his hackle feathers. I have made cuckoo (barred) khaki’s
from chocolate cuckoos. I believe this will be my last contribution to the
Polish breed!
In November 2002 I had reserve Champion Polish bantam with a WC chocolate hen at
our Ohio National Show, in Columbus Ohio. The competition was fierce, with 142
Polish bantams competing, of which over 100 WC blacks. At that moment I
considered the chocolates were here to stay!
[1] The Araucana breed is the only breed that had the dun gene, a mutation, no doubt. Several breeders have introduced duns to other breeds. We now have solid duns in Wyandottes and Rosecomds and many OE Games.
By Luuk Hans
In 2004 I received six eggs, sent by mail from the USA. I hatched two cocks and two hens, the cocks were chocolate, the hens were khaki. How lucky can you be?! I gave a pair to a well known Dutch breeder and I kept a pair myself. This year I hatched some good chocolate and khaki chickens. Compared to our standard the crest is somewhat too big, i.e. the vision of the birds should be better. Also the wings are carried too low (no doubt an inheritance of crosses with Rosecombs). On the other hand the feathers are softer than of our Poland bantams. Apart from that these aspects the American dun Polands have stolen my heart for their curiosity and nice character.
Note: In January 2009 both colours have been recognized in the Netherlands. In Germany the chocolate colour is in the process of recognition.
The Dutch Poland Club has published a booklet on Poland’s. Unfortunately only in Dutch. It is a real 'must' for people who collect books on Poland’s. The booklet has 60 pages and is illustrated with a lot of colour pictures of Poland’s in all varieties.
The booklet costs Euro 4,50 (excluding postage costs)
and can be ordered by sending an email to the secretary of the Dutch Poland
Club (info@kuifhoenderclub.nl).