EGG BINDING
General information
While most female birds have no problems laying eggs, occasionally they may
encounter difficulty. When detected early, the condition can usually be resolved
easily. If a prolonged period of time has elapsed since attempts at egg laying
began, the bird may become critically ill. Most owners are surprised that a
female bird not exposed to a male will lay eggs. If owners keep in mind that
human females ovulate regardless of the presence of a male, then it makes sense
that a female bird ovulates without a male as well. The major difference is
that the egg is microscopic in people and so not easily visualized, whereas
in birds the egg is large, has a shell, and is expelled from the bird.
What causes egg binding?
Egg binding occurs when the female bird is unable to expel the egg from her
body. There are numerous factors why this may occur. Many birds are improperly
fed by their owners and eat nothing but seeds. Seeds are deficient in many vitamins
and minerals, especially calcium, vitamin E and selenium. These vitamins and
minerals are necessary for proper contraction of the muscles of the oviducts;
improper muscle contractions can result in failure to pass the egg. Egg deformities
may also occur. Obesity (from an all-seed diet), lack of exercise, heredity,
senility, and improper environment are other causes of egg binding.
Are certain birds prone to develop egg binding?
Yes. Budgerigars, canaries, cockatiels, finches, and lovebirds most frequently
have problems related to egg laying, although any bird can become egg bound.
How can I tell if my bird is egg bound?
Many owners do not even know if the pet is a female, and often don't suspect
egg binding as a cause of their pet's illness. Predetermining the sex of your
pet bird by a simple blood test can aid the vet in considering egg binding as
a possible cause of your pet's illness.
Birds with egg binding are usually depressed, fail to perch, often sit on the
bottom of the cage, and may strain as if trying to lay an egg. If the egg is
putting pressure on the nerves that control the legs, paralysis may result.
Since the signs associated with egg binding are also seen in sick birds with
other causes of illness, diagnostic testing is essential in formulating a proper
diagnosis.
How does the vet diagnose egg binding?
During the physical examination the vet may palpate (feel) the egg inside of
the bird. Usually radiographs (X-rays) are needed to diagnose egg binding. Early
diagnosis is important; smaller birds can die within a few hours of becoming
egg bound.
How is egg binding treated?
Treatment varies with how sick the bird is when presented to the vet as well
as the location of the egg and the length of time the bird has been egg bound.
Critically ill birds are first treated for shock and then attempts are made
to treat the egg binding. Mildly affected birds may respond to supplemental
heat, calcium, vitamin E, selenium, and vitamin D-3. Other injectable drugs
may help cause the oviduct to contract and expel the egg. If the egg is near
the cloacal opening, the vet might be able to gently extract it. Eggs that do
not pass with drug therapy require more aggressive treatment. The vet may need
to place a needle through the abdomen into the egg shell and aspirate the contents
of the egg, causing the shell to collapse. The shell will usually pass out of
the bird within a few days. Failing this, surgery may be performed to remove
the egg or shell fragments.
Can egg binding be prevented?
Maybe. Certainly birds on a poor diet should have the diet changed following
instructions from your vet. Calcium, phosphorus, vitamin and mineral supplementation
may be recommended. Obesity should also be corrected. Birds that are chronic
egg layers might respond to hormonal drug therapy, although this can be associated
with severe side effects. A hysterectomy can also be performed to prevent egg
laying and egg binding.
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