Pear — Food safety facts
Feed with care · Dogs · full breakdown on the linked food page
Flesh is safe. Remove the core and seeds — seeds contain cyanide compounds.
Short answer
If the pear you gave your dog was just the flesh and you removed the core and seeds, it’s generally safe. The fruit itself is low risk, but the seeds contain cyanide compounds that can be harmful in larger amounts. Watch your dog for any vomiting, diarrhea, or signs of abdominal discomfort. If any of those symptoms develop, give your vet a call.