my dog adores ham. one of his favorites. LOVES it. but of all the meats in the world, ham is the one i worry most about going rotten. and secretly rotten, too, not obviously rotten. Ham can taste fine, and make you sick as sick can be for days and days. Especially if it is shaved or sliced ham, woah baby, can that stuff go bad FAST. I'd be super careful about keeping treats with ham in it, very very well chilled and use them up within a day or so of taking them out of the freezer. so just be very vigilant about keeping the treats WELL CHILLED and safe if there is ham in them, cuz ham can go so secretly rotten, so so very fast. Twice in my life, i've been deathly sick off of ham...i mean SICK. It's left me with the urge to be super super super super careful about ham. GLAD YOUR DOG LIKES THE TREATS!!!!!!!!!