KNMG;3679970; said:I stop feeding mine when the temps here get below 50. I've never given any substrate to burrow in though. Usually start feeding again in spring when the daytime temps get into the 60's. They aren't kept completely outside, just in my unheated garage. I never gave them the ability to do this until they both had a 10 inch shell length. Before that they were in heated tanks year round. Hope this helps.