Isn't this interesting,
Karen
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The Sussex Fowl by Sharpe .
CHAPTER XL. Page 170
Vertigo.
There is a rather common trouble sometimes
seen in young growing cockerels which I think I should
like to mention, more especially as I have noticed it
rather more particularly in our strong growing "Sussex' '
chickens — Vertigo. It may cause death, it may only
be a short attack and the bird is soon all right again ;
I however, it may be well to mention here that it is a
sign of good feeding , or, perhaps, I should say, "strong
'feeding," hence the reason we see it more often in a
batch of growing table chicken.
Symptoms.
The Symptoms of this trouble cannot be mistaken
when once seen ; it appears as follows : generally
first seen in chicken, age 8 to 16 weeks — sometimes
adult birds get it. The bird will be seen to hold its
head over on one side and in moving will spin around ;
it will recover for a few minutes and then have another
attack. The trouble is due to high feeding, often caused
by using too much animal food, and owing to high
blood pressure on the brain the bird loses control of
its actions. Sometimes a form of congestion will
bring on vertigo, but in such a case it does not last long.
Cure.
It may be cured by lower feeding, a few Glauber
Salts and keep the bird in a quiet and somewhat darkened place.
Glauber Salts:
So called from Johann Rudolph Glauber, a German alchemist, who discovered
it in 1658 in his researches after the philosopher's stone. It is the sulphate of soda
definition:
http://www.factmonster.com/dictionary/brewers/glauber-salts.html
http://www.answers.com/topic/glauber-s-salt
where to buy:
http://www.pburch.net/dyeing/dyeblog/C1134262190/E580655508/