This section is from the book "A Manual Of Toy Dogs: How To Breed, Rear, And Feed Them", by Leslie Williams. Also available from Amazon: A Manual Of Toy Dogs: How To Breed, Rear And Feed Them.
Beta-naph-thol, given in pills containing ½ gr. each, is a valuable drug in cases of indigestion where eructation and disagreeable breath are noticeable. For toys under 5 lbs. ¼ gr. pills must be given; one pill in either case to be given about ten minutes after each meal. The effect of the drug is simply to check the fermentation of the food and the consequent formation of foul gases in the stomach. Where this form of indigestion is accompanied by diarrhoea, salol may be given instead of naphthol, in the same doses; but it and naphthol do not suit all dogs alike, though neither can do any harm, and if the patient is sick after a dose, the sign has been given that marks the treatment as unsuitable to his individuality. As in the case of human patients, the dog doctor may have to try several methods of treatment before he hits upon the cure. Pills are often troublesome to give, which fault cannot be found with powdered vegetable charcoal, to which few dogs make any objection when it is sprinkled upon their food and lightly covered with a few tiny bits of something very dainty; but where the owner prefers to give medicine apart from the food, enclosure of powder in a capsule is always practicable.
A simple and tasteless powder is included among the Kanofelin Remedies, and may always have a trial, given with the food, in cases of indigestion.