actually ....(this is unorthodox maybe to some people) but when i had my porcupine puffer i used to feed em frozen peas and carrots and it loved it , thats how i always kept his tooth down , peas are perfect cause hell be able to peel them , also you can try frozen silversides and krill, give em something to peel, also nassarious snails could get more expesive than a bag of krill or frozen veggies