Questions are never silly. We all worry about our babies so good you ask! I think it's because of sitting on a cold floor. As long as his tummy doesn't stay cold when he's sleeping in a blanket or another warm place he's okay I guess.
Our asylum has the habit of eating their raw so fast that their bellies get full AND cold if it's not warmed up really well. Kinda odd to have a lil kit lookin like they swallowed a grapefruit and feeling like it was frozen when they did it!! Lol. They warm up in a few minutes and everything is peachy!