If your poodle eats onions or garlic in any form (powdered, raw, or cooked), it will cause gastrointestinal discomfort and lead to bigger problems like red blood cell damage and anemia. If your poodle somehow eats onions or garlic, youll want to monitor them for the next 24 hours and look for anything out of the ordinary like vomiting, diarrhea, or weakness of breath.