Hello! About 3 weeks ago I found my 6 year old desert tortoise in a different burrow than when he fell asleep.(he's hibernating) a few days prior he was still in the first burrow. when I found him it looked like he had pooped out a urate because the back of him was all covered in white powdery stuff and there was a lot the white stuff on the floor below him. It was raining the day I think he moved. What does this mean???