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DL
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xx Softshelled/yolkless egg
« Thread started on: Oct 29th, 2006, 1:09pm »

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This member suspects lime as inducing calcium deficiency resulting in the soft-shelled yolkless egg pictured in the photo above.

The following thread taken from BYC discusses various egg abnormalities and their eventual causes and is reposted here with the kind permission of the Board Owner at BYC:


smo - Membrane coming from a hen
------------------------------------------------------------------------------I had one of my hens put into a cage to prep for show. Well, I noticed her looking a bit distressed, like she was trying to lay an egg, that kinda look about her. Well, after a while, she still had that look so decided to check her out. I noticed a thin white thing coming from her vent so I immediately thought WORM. OMG...well, the good news is it was not a worm. I gently pulled on it and it got thicker and longer, and it turned out to be like a membrane of an egg. I even had hubby look at it to see what it was and he agreed, definetely not a tape worm or anything. After I got this out, I put her back in the cage for a while and left her. I come back a while later and she looked much better, eating and all again.

I wonder, what should my concerns be? They always have oyster shell, but seeing I moved her in the cage, I added some to the feed cup. I had found a yolk of an egg a few weeks ago, nothing else, so I wonder if maybe she has something going on. Is this just from lack of oyster shell or is the problem something more serious like internal laying?

I had a young pullet die a week ago too, just looked bad one day and gone the next.


dlhuni - Re: Membrane coming from a hen
-----------------------------------------------------------------------------What are you feeding them? How old is the bird you posted on? Many things can affect the uptake of calcium and many illness will cause malabsorption of nutrients and softshelled eggs will often be an indication that something is not right (nutritionally/disease) in birds...


smo - Re: Membrane coming from a hen
------------------------------------------------------------------------------Umm, Well, she is probably about a year and a half, and they get game bird layena or flock raiser, they also get ACV in their waterer, they get boiled eggs once a week shells and all that has the following mixed into it:
Garlic, Wheat Germ Oil, Brewers Yeast, DE, Spirulina, Bee Pollen, Clovite, Fish Meal, Kelp Meal, Oatmeal, cat food and Avia Charge 2000.

dlhuni - Re: Membrane coming from a hen
------------------------------------------------------------------------------Oh my! Well then it does sound as though a vitamin deficiency is not the root of this...perhaps it was just one of those occasional occurences? (Hope so!)

Wes - Re: Membrane coming from a hen
------------------------------------------------------------------------------*** you have had sick birds around your place and it could be they had Brohncitus(sp) and this could be a result of them be sick prior to this. This is just a thought of mine. Laying problems can develop from birds that have had or been exposed to the disease.

Also it could just be fluk thing. Keep a close eye on her though for signs of infection setting up in the oviduct. Heck you may even want to put her on an antibiotic to preclude one from happening.


cal - Re: Membrane coming from a hen
------------------------------------------------------------------------------ I agree with Wes. I have a lot of experience with the problems in the reproductive tract because I took in some hens from a commercial egg facility who weren't in good condition. I would have that hen on antibiotics right away, because if it gets a chance to take hold, it can be too late to cure.


V - Re: Membrane coming from a hen
------------------------------------------------------------------------------ I had one of these about two years ago. It looked like this:
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I never had any problems until this summer (egg cracked inside hen) and it was probably completely unrelated anyway



dlhuni - Re: Membrane coming from a hen
------------------------------------------------------------------------------Do you all use lime in your runs?


V - Re: Membrane coming from a hen
------------------------------------------------------------------------------I haven't used lime at all, ever.



dlhuni - Re: Membrane coming from a hen
------------------------------------------------------------------------------ I asked as another member was also searching for info and found the following and thought that might have been the cause (had redone the runs and thought the bird might have ingested in some way):
http://edis.ifas.ufl.edu/PS029
"Periodically, dolomitic limestone is offered to the feed industry. However, dolomitic limestone(which is used in the steel industry) should never be used in poultry diets. Dolomitic limestonecontains at least 10% magnesium, and this complexes with calcium or competes with calcium forabsorption sites in the intestines. The consequence of feeding dolomitic limestone is inducedcalcium deficiency."

other factors which might be involved:
(same link as above):
"The nutritional role of phosphorus is closely related to that of calcium. Both are constituentsof bone. The ratio of dietary calcium to phosphorus affects the absorption of both these elements;an excess of either one impedes absorption and can reduce egg production, shell quality and/orhatchability."........
INFECTIOUS BRONCHITIS:Infectious bronchitis occurs only in chickens (Infectious bronchitis is different from Quailbronchitis which affects Bobwhite Quail). All ages of chickens are susceptible to infectiousbronchitis. In laying hens it is characterized by respiratory signs (gasping, sneezing, coughing)and a marked decrease in egg production. Egg quality is also adversely affected. Low eggquality and shell irregularities (soft-shelled or mis-shapened) may persist long after an outbreak.Chickens that have had infectious bronchitis, especially during the first week of life, maynever be good layers................"
(the following article also says: "If one disease had to be singled out as being responsible for the majority of the economically significant production losses in egg layers, it would have to be infectious bronchitis. Infectious bronchitis virus, a coronavirus, has a preference for the mucus membranes of the respiratory and reproductive tracts. The kidney is also affected by certain IB virus strains. Not only is eggshell quality affected, but internal quality also declines. Watery whites are very common and can persist for long periods after egg production returns. Also, an IB outbreak can result in a pale-colored shell in brown shell eggs" from: CONCEPTS OF EGGSHELL QUALITY:
www.afn.org/~poultry/flkman4.htm

www.msstate.edu/dept/poultry/pub900.htm
"Yolkless eggs are usually formed about a bit of tissue that is sloughed off the ovary or oviduct. This tissue stimulates the secreting glands of the oviduct and a yolkless egg results."
« Last Edit: Oct 30th, 2006, 09:40am by DL » User IP Logged

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xx Re: Softshelled/yolkless egg
« Reply #1 on: Oct 30th, 2006, 09:09am »

(contd )

http://www3.sympatico.ca/davehansen/reproduc.html
CYSTIC OVIDUCTS:
Sometimes a cystic distension of the oviduct occurs. This causes general malaise, the inability to lay eggs and a gradual soft enlargement of the abdomen. If the abdominal wall is cut an enlarged oviduct is noticed. The enlargement may occur throughout its length or be only a localised swelling, which is sometimes like a pouch on one side of the duct. The oviduct is usually a creamy colour covered by a few small blood vessels. Occasionally it is grey in colour and the swelling more angular, with clear watery contents containing solid, cheesy masses or particles. Both types probably represent a chronic inflammatory process with outpouring of mucus and abnormal albumen which contains broken-down yolk material. Bacteria are seldom found in this material. Bulges in the oviduct wall probably indicate where an egg or yolk had previously been retained. No medical or surgical treatment can restore normal function to oviducts affected in this way. Clinical signs may be vague. Straining does not necessarily mean that there is some form of obstruction. It is important not to confuse egg-binding and dilated oviducts with other causes of abdominal distension. However, to decide whether the genital or alimentary tracts are affected or if a tumour is present in the abdominal cavity can be very difficult.

EGG ABNORMALITIES:
Small yolkless eggs are sterile. They do not usually cause any trouble and may be considered normal if passed occasionally at the beginning or end of a laying period. If they are produced frequently, they may indicate an inflamed oviduct; aberrant yolks shed into the peritoneal cavity; chronic, infectious condition of the ovary, or in aged birds a fibrous, cancerous or degenerative ovary. Soft or shell-less eggs are most likely to result from calcium deficiency as the result of providing inadequate amounts of soluble grit. Even with adequate grit, however, overbreeding or the end of a normal season may be heralded by one or two unshelled or otherwise defective eggs. If a series of such eggs is passed, inflammatory changes may be suspected, affecting the shell-secreting glands of the oviduct and resulting in inhibited secretion. Conversely, although secretion may be normal, the egg may be passed through the oviduct too quickly for sufficient shell to be deposited. A soft-shelled egg remaining in the lower part of the oviduct does not appear to initiate the normal reflexes and the egg may therefore be deposited anywhere or even retained.."


« Last Edit: Oct 30th, 2006, 09:09am by DL » User IP Logged

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