FEATURE
Long, sharp toenails can also cause infertility. If the cock has a habit of placing his foot on the side or back of the hen before copulation, he may irritate her with his pointed, pin sharp nails and she may not accept copulation at that time.
they did the year before. The inexperience and ignorance of a young pair of birds often contributes to infertility resulting in a clutch of clear wasted eggs. Mistakes are made in courtship, mating and nesting. Style and successful copulation improves with age, eventually they will get it right. In this case removing the nest box for a couple of weeks and letting the pair rest then placing the nest box back in the aviary and letting them try again is all that it takes. Sick and unhealthy birds usually don’t
fertile eggs to be laid. Delaying egg laying by late installation of the nest box or boarding up the nest entrance temporarily until fertility is accomplished may be the best way to deal with this timing issue. Younger pairs may also need more
stimuli to breed. Older experienced birds will start breeding much more readily and usually go to nest at a similar date as
breed and if they do the chances of infertility are usually high. Internal Papilloma Disease causes wart-like protrusions from the vent area of both male and female birds, often resulting in infertility. In severe cases, an avian veterinarian can burn off and remove these warts, allowing the eggs to be fertilized. This disease may still be carried by the parent birds and the pair should not be allowed to hatch and feed their young. Instead eggs removed from these pairs can be given to foster parents or incubated. Alternatively the female may have blocked tubes, ovulation problems, or a hormonal imbalance. The male can have a low sperm count or immature sperm incapable of fertilization. Marginal illness in either the male or the female can be responsible for infertility. If the female has laid several clutches of infertile eggs in succession, she is
BIRD SCENE 31
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