The existence of canker in dogs' teeth is generally another consequence of bad rearing and farinaceous feeding. Meat - fed pups, from meat - fed. parents, have conspicuously good sound teeth, whereas among kennelled dogs it is not at all uncommon to find specimens of mouths cankered throughout, and this condition is certainly sometimes transmitted to the offspring. The teeth look deep yellow, or brown, the dental enamel is soft, and in bad cases they drop out. The gums are soft and spongy and pale. The disease being constitutional, little or nothing can be done to arrest the decay of the teeth, which luckily seems painless. The dog should be carefully fed on the most nutritious underdone meat, and the mouth may be washed out daily with a very weak solution of permanganate of potash : just enough of the crystals to tinge warm water pink being used. The best way to perform this little operation - one to which most dogs object very strongly - is to get someone to hold the head, with the nose pointing downwards, over a basin, and to introduce the nozzle of a gutta-percha ball syringe between the lips at the back of one side, letting it enter that spot in the jaw where there is a hiatus between the lower teeth.

Two or three squeezes of the ball will then wash out the mouth pretty effectually.

This cankered condition of dogs' teeth may be brought about by the absorption of mercury into the system. A dog which had been troubled with very obstinate recurrent eczema, known to be inherited from ill-reared parents, was apparently cured as by magic when sent to a veterinary surgeon, who dressed him all over with mercurial ointment. The improvement in his condition continued for about three months, when it was discovered that he ate with difficulty. His mouth being examined, the teeth, previously sound, were found to be like so much dark, yellow-brown leather, and the gums sore. The next development was in the form of a cancerous growth in the posterior nares, and so the poor animal died, a victim to a cruel "fake," for which the surgeon had obtained the credit of a cure. Such cases are not at all uncommon.

Dental Caries, such as affects our own teeth when they decay and have to be stopped, occasionally,though luckily not often, distresses dogs. They may bruise the dental pulp inside a tooth by biting very hard on a bone, or by playing too roughly, and more especially by carrying stones, a very bad practice. The only thing to be done is generally to extract the tooth under chloroform, since it is difficult to find dog-dentists who will stop a decayed tooth. A dog with toothache, rubbing his face on the ground and crying, is a pitiable sight.

Abscesses between or on the Toes are a form of eczema, and should be treated constitutionally, as suggested under the heading of Anaemia, eczema's usual cause. Dogs will worry these sores, and must be prevented from doing so by having the foot encased in a sock made of strong washed calico, tied round the leg with tape. Before putting on the sock, dress the sore with iodoform powder or zinc ointment.