3. Sweating.—There are some females which, during the time of incubation, or while they are on their young, are subject to profuse perspiration; the feathers of the belly are in consequence so wet as to destroy the brood: as soon as this indisposition is perceived the invalid must be washed with salt water, and after a few minutes be plunged into pure water, to wash off the salt, and be dried in the sun as quickly as possible. This operation is to be repeated once or twice a day till recovery; but as relapses are frequent, it is better to separate the female, and not allow her to sit.
4. Asthma, or hard breathing, which arises from an oppressed stomach, generally yields to plantain and rape seeds moistened with water as the sole food.
5. Sneezing, produced by an obstruction in the nostrils, is removed by passing a very small quill up them to clear them.
6. Loss of voice.—It sometimes happens that after moulting a male suffers the loss of its voice; it must then be fed with the same paste as is prepared for young birds, adding some lettuce-seed, and, according to some bird-fanciers, a bit of bacon should be hung to the cage, for it to peck.
7. Constipation.—The remedy for this is plenty of green food, as lettuce leaves, water-cress, &c., not forgetting bread and milk.
8. Epilepsy, which is common among many kinds of birds, may be produced in canaries by particular causes, as great delicacy and timidity. We should therefore avoid alarming them, either by catching them too suddenly or violently, or by tormenting them in any way. They are to be cured as has been already directed in the Introduction.
9. Overgrown claws and beak.—When the claws or beak want paring, sharp scissors must be used, and care taken to avoid drawing blood, lest the bird should be maimed. They often injure themselves when their claws are too long, and get hooked in the wires of the cage, and continue thus hanging. The females, in the same way, get entangled in their nests.
10. Lice.—The parasite insects by which these little prisoners are often tormented, are generally produced by slovenliness. Besides frequent bathing, the cages must be cleaned with much care and vigilance, and have plenty of very dry sand strewed over the bottom. These lice, like bugs, retire during the day to cracks and crevices, which accounts for old wooden cages being often infested. To get rid of them, hollow sticks or stalks of rushes are used, which must be examined and changed every day. The plan is good, but by using only tin cages, which may, more easily than any others, be passed through boiling water, the object is more certainly attained.
It is rare for canaries which are kept for breeding to live longer than from seven to ten years; while others, if well used, may be preserved for eighteen or twenty years.