This disease consists in inflammation of the laminÆ and of the vascular parts of the sensible foot. It sometimes attacks only one foot, sometimes two, and sometimes all four; but, in a great majority of cases, it attacks either one or both of the front feet. A chronic form sometimes occurs, and exhibits symptoms somewhat similar to those of contraction of the hoof; but acute inflammation of the laminÆ is what is generally called founder.

This disease is occasioned by overstraining of the laminÆ from long standing, by prolonged or excessive driving over hard roads, by congestion from long confinement, by sudden reaction from standing in snow after being heated, or from covering with warm bedding after prolonged exposure to cold, by sudden change of diet from a comparatively cool to a comparatively heating kind of food, and by translation of inflammatory action from some other part of the body, particularly after influenza.

In the early stages of founder, a horse evinces great pain, shows excessive restlessness of foot, and tries to lighten the pressure of his body on the diseased feet. In the more advanced stages he is feverish, breathes hard, has violent throbbing in the arteries of the fetlock, lies down, stretches out his legs, and sometimes gazes wistfully upon the seat of the disease; and in the ulterior stages, if no efficacious remedies have been applied, the diseased feet either naturally recover their healthy condition, or they suppurate, slough, cast part or all of the hoof, and gradually acquire a small, weak, new hoof, or they undergo such mortification and change of tissues as to render the animal permanently useless.

The shoe of a foundered foot must be removed; the hoof should be pared in such a manner that the sole and central portion of the same alone come to sustain the weight of the body. Therefore, the wall of the hoof, or that portion of the hoof which, under normal conditions, is made to bear upon the shoe, should be pared or rasped away, all around, to such an extent that it does not touch the ground when the animal stands upon the foot. A well-bedded shed, or a roomy, well-bedded box-stall, should be provided, with a view of allowing ample room for stretching out, as well as for changing position on a floor which should not be slanting, and which conveniences can not be had in a single stall, or when the animal is kept tied up in a confined space. Fomentations, evaporating lotions, wet cloths, and moist poultices should be applied to the feet. The animal ought to have light and spare diet, and bran mashes. When much fever exists febrifuges and diuretics should be given.