Question: are crab apples bad for puppies?
Answer: As with full-sized apples, the stems, leaves and seeds of crab apples contain cyanogenic glycosides, or cyanide -- toxic to puppies and dogs. This can cause vomiting, diarrhea, reduced blood oxygen, decreased heart rate, seizures, coma and even death. If your puppy is eating crab apples, make sure it is only the flesh.