BALDNESS
When two crested canaries are bred together some of the chicks will be permanently bald. Another cause, apparently, is the tendency for some birds to constantly rub their heads against the perch or bars of the cage. This condition is sometimes accompanied, or perhaps caused by the presence of lice.
Sometimes baldness is caused by an incomplete moult, the lost feathers not having been replaced during the regular moulting season. Sometimes severe changes in the weather during the moult, or food deficiency during the moult is the cause of incomplete feather growth.
There is no treatment for inherited baldness. If lice or mites are present, treat the bird as indicated under “[Mites].” See that the bird has a normal seed diet with plenty of greens, a cuttle bone in the cage, plus egg food and moulting food two or three times each week. Allow the bird to exercise as much as possible, and there is a good chance that during the next regular moult the feathers will return.