The treatment that I would recommend is to find out the true cause and remove it. When the puffy swelling is hot and painful, apply cold water or ice packs. When the heat and pain have subsided apply the following: Tincture of Iodine, two ounces; Gum Camphor, two ounces, dissolved in one pint of Gasolene. Shake the contents of the bottle before using each time and apply with a nail or toothbrush every forty-eight hours. This is very penetrating and will remove the enlargement or absorb fluids that might have accumulated from the result of the bruise. CASTRATION. There are few countries where this operation is not performed to any great extent. Under favorable conditions of health, castration should be performed at the age of one year. The safest months are April and May, and the safest time a week or two after being turned out to pasture when he is shedding his coat. Do not operate upon a colt that has been kept in ill ventilated place, but have the colt in good condition, and the weather moderate, neither too hot or too cold. See that he has no distemper or any such disease. It is necessary that the hands and instruments be thoroughly cleansed by washing them in hot water, a little soap and a few drops of cresol. If the age be above a year it is best to feed very light the day before the operation, as there is less danger from being thrown and tied and also from the operation itself, when the bowels are empty. It is very important to ascertain whether or not the colt has ever suffered rupture, as he must be operated upon differently. Examine the testicles to see that they are down. Generally speaking after these precautions, so far as the animal is concerned, he is ready for the operation.