When consuming small amounts, dogs that ingest avocado are not in danger of serious health problems, according to the ASPCA. If a dog consumes avocado, one symptom to expect is mild stomach discomfort.
Some commercial dog foods include a small amount of avocado meal or oil for nutritional benefit. Avocado is dangerous for consumption by some other animals, including horses, cattle and birds, and can lead to death. Dogs and cats are largely unaffected. The Pet Poison Helpline points out that while the food itself is not very dangerous to dogs, it could obstruct the dog's esophagus, stomach or intestinal tract if swallowed whole.