Chronic egg-laying occurs when a female bird lays one egg after another or lays repeated clutches of eggs. Chronic egg-laying may lead to malnutrition and egg binding. There are both behavioral and medical interventions to stop chronic egg-laying.
Egg binding is not uncommon in birds and may be resolved easily if treated early; if not, the bird may become critically ill. Egg binding occurs when the female bird is unable to expel the egg from her body. Egg-bound birds are usually weak, not perching, often sitting low on the perch or on the bottom of the cage and are straining as if trying to defecate or to lay an egg. Treatment varies depending upon how sick the bird is, as well as the location of the egg and the length of time the bird has been egg bound.
Rabbit syphilis is a sexually transmitted disease caused by a spirochete organism called Treponema cuniculi. Infected rabbits will develop sores that are confined to the mucocutaneous junctions, such as the external genitals, anus, lips, nostrils, and eyelids. Treatment involves two to three weekly penicillin injections. Humans cannot contract this disease from rabbits.