Radish — Food safety facts
Safe to share · Dogs · full breakdown on the linked food page
Safe in thin slices. Very spicy radishes can upset the stomach.
Short answer
Yes, radishes are safe for dogs in small amounts. Give them thin slices as an occasional treat. Very spicy radishes can irritate the stomach, so stick to mild ones. Watch for any vomiting or diarrhea and contact your vet if you notice problems.