DEAR DR. FOX: We spend the winter in southern Texas and need something for fleas. -- J.R., Mercedes, TexasDEAR J.R.: I am sorry to hear about this frightening adverse event, and am glad your dog survived. I wonder about the long-term consequences on animals who recover from adverse reactions, or who do not develop immediate adverse reactions but could eventually become epileptic or more aggressive, or develop cancer or chronic spasmodic bowel conditions. A GOOD DOG FOOD SUPPLEMENTI advise adding shredded, unsweetened coconut to dogs’ food (1 teaspoon daily per 30-40 pounds of body weight). Readers who already have my dog food recipe should add this ingredient!