Worms occasionally cause paralysis of the hind legs. People often wonder how dogs get worms, especially pet dogs, who seldom leave their mistresses’ side, but it is easily accounted for, first, when it is taken into consideration how susceptible they are to these parasites; a dog, for instance, fed on raw meat or uncooked milk, or if he eats grass where there are sheep or rabbits, or if he drinks out of a pool which drains from land on which sheep are grazing, he is almost certain to get tapeworm, for sheep and rabbits are the intermediate host of some of the most common kind. Lice, again, act as the intermediate host of other sorts. I may here mention that tapeworms do not breed in a dog, but the eggs or larvæ must pass out of him and be swallowed by some other living creature, who is called the intermediate host. Here they develop into cysts or bladder-worms, and if these in their turn are swallowed by a dog they develop into a tapeworm, and so the cycle is completed. _Treatment_: It is most important that house dogs should be kept free of worms, for if by chance or accident a person swallows an egg or larva from a tapeworm there is the danger of a cyst or bladder-worm forming in one’s liver, which is a most serious and often fatal disease. As to the treatment of worms in young puppies, unless the case is serious it is not advisable to commence dosing before the puppy is five weeks old, and then a dose of the following medicine may be given three times a week, half an hour before food:— _Recipe_: _Worm Mixture_: Santonine, 1 scruple. Liquor Senna Dulc., 1 ounce. Glycerine, ½ ounce. Syrup Aniseed, 3½ ounces. Well mix. _Doses_: For small puppies like griffons, etc., when five or six weeks old, a quarter of a teaspoonful; fox-terrier puppies, same age, half a teaspoonful; retriever puppies, etc., same age, three-quarters of a teaspoonful; St. Bernard puppies, one teaspoonful—to be given half an hour before the first morning meal. Repeat twice a week. The doses may be gradually increased, according to age and size of puppies. The bottle must be well shaken before pouring out the dose.