Bichon Frize cannot eat many fruits, but the more common ones are grapes, mangoes, strawberries, pineapples, etc. Among them, grapes must not be fed, because eating too much will increase the burden on the dog's kidneys, and in serious cases may cause kidney disease. Exhaustion. And it is recommended that fruits be used as complementary food, because when dogs consume too much vitamin C and plant fiber, it may cause diarrhea or stones.