Fish of any kind are a very good food for trout. If they are small they may be put into the water whole, the trout will take them all the better if they are alive. Any coarse fish which can be obtained cheaply and in sufficient quantities may be chopped up fine and used as food. As we said before, they will not eat carrion unless pressed by hunger. They will eat a live trout, but we have never known an instance of their eating, or even touching a dead one. If any way could be devised of raising flies, or shrimp, or various kinds of insects (their natural food) in sufficient quantities and at little expense, this would be the best of all. A change of food would also do them good, but we find that they will not readily change their food.

As to the quantity of food necessary for a given number of trout. This is difficult to give exactly as it will vary with the size of the fish and the season of the year, more being required in moderate weather than when it is very hot or very cold. For one thousand three year olds, about five pounds of light or liver per day; for two year olds three pounds; but a very little trial will show just how much to feed them. Feeding once each day will keep the trout, over one year old in good condition. Feed slowly, and as soon as they begin to refuse the food stop feeding them, then you have the measure and feed a little less than this quantity every day. We say a little less because we have known cases in which owners of ponds being over anxious to fatten their trout, have killed them by over-feeding. Still this does not often happen, especially if they are fed regularly. A trout after long abstinence will gorge himself to repletion ; but will not kill himself to-day if he is reasonably sure of to-morrow's dinner. All animals appear to be wiser than men in this matter, and it is very seldom that they will eat enough to do them injury no matter how much may be given them.

Salmon and salmon trout as we have heretofore remarked will, when they are young accept food that is rather less finely prepared. Their food is of the same general kind, but as they are larger fish they need more of it. Salmon trout can be kept in confinement until they weigh ten or more pounds, whereas the largest tame trout we have had did not exceed four, but few reached three, it being doubtful whether fish ever attain as full development in the domesticated as in the wild state.

As salmon trout will grow to weigh a hundred pounds in Lake Superior, it is probable they may reach twenty in suitable preserves, although the largest we have is not over nine, but he is healthy and is still growing. Salmon trout have been taught to eat trout that died of a natural death, although they at first utterly refused such food they came in the end to accept it willingly. Trout seven inches long have been disposed of in that way.

Trout and salmon, the latter especially, will get so tame after a time that they will take the food out of your fingers, in fact they will take the fingers too. Their teeth are sharp and make scratches like needles. They may be taught to jump for their food by holding it a short distance above the water, or may be made to come up and take it out of the pan you are holding. Feed in the middle of the day when the sun is well up, any time from ten to three is good. Make it a general rule to feed slowly and give them as much as they will eat without wasting.

Although trout and salmon become so tame that they may be made pets, some hybrids in the state hatching works are so shy that they keep as much as possible out of sight, and can hardly be fed. They were a cross of the milt of the salmon with the brook trout eggs, and perhaps knew that they were monstrosities. There is a board covering to the edges of the preserve in which they are kept, and they hide under it and run hither and thither in fright and confusion if any one attempts to get a close view of them.

Salted food has been tried for the feeding of trout, but not with satisfactory results. They do not seem to like it although it is possible they might be accustomed to it if any important advantage was connected with its use. It, however, ordinarily costs as much or more than the fresh meats, and cannot be superior to them. There is much of the offal of large cities which may yet be utilized as fish food. Where it is allowed to go to waste and run into the rivers adjacent to markets, it invariably attracts wild fish to such places, and if it is satisfactory food for them, it would be equally agreeable to their tame and less particular brethren. The fish breeder must not rely upon getting his food of any kind for nothing, as although most country butchers throw away their beef lights, they will put a price on them the moment they find they are in demand. Three cents a pound is the price usually asked for such food, and at that it is doubtful whether trout can be bred and raised for the market even when they can be sold for a dollar a pound.