fuzzy mouse or fuzzy rat??? A yearling can easily take a fully grown mouse or similarly sized rat (if not a little bigger). However, based on your description, he may be stunted. If he's been surviving on fuzzy mice, I'd give him a week and offer a hopper. Then give him another week and offer a small mouse or rat pink. Another week and offer a large mouse or rat fuzzy. Build up slowly. Once a week feedings are sufficient with appropriately sized prey. Work up to a prey size that is slightly less than as big around as the snake is at his largest point. But build up to it, don't just throw a 70 gram rat in there!

Steve