I finally have my 3 month old ball python eating regularly for me. He currently weighs 153g, and will take a hopper. However, I barely ever see a lump on him after he eats, and dont want to feed him less than what he needs. He had a rocky start when it came to eating for me.

I bought a batch of fuzzy rats, but he refuses to eat them. Is there a good strategy to get him to switch over? I've tried chicken broth, and leaving the f/t in overnight with no luck. If not, I also bought some adult mice, but if rats are better I'd rather give him those.