Yes — fresh chunks in moderation.
Fresh pineapple is safe and most dogs love the sweetness. Canned pineapple in syrup is too sugary — stick to fresh, and remove the tough core.
Enjoy — this is a safe treat in sensible portions. Introduce any new food gradually and watch for individual sensitivities, just like with people.
Get the printable list of the 30 most dangerous foods for dogs.