Well, I always was curious why , when I picked my 2 year old sulcata to give her a soak. I would feel this like thumping under her carapace. Well....I sure did find out today. Right as I was lowering her down into the water she let a big fart out...lol..I laughed so hard. I'm thinking its all the fresh greens out of the garden that she is eating that is giving her gas. Anyone ever have this happen?