French dogs can eat pineapple. A small amount of pineapple can help the dog supplement its nutritional needs, but it should not be overfed. If the dog at home has a bad gastrointestinal condition and is prone to indigestion, the breeder should be careful when feeding French bulldogs. Canine pineapple. Improper consumption of pineapple or excessive consumption of pineapple will cause diarrhea in dogs. When feeding, be sure to control the consumption and do not let the dog eat to full at one time.