Well Fen has been with us a month now. I sure do get tired of him sometimes. It is a LOT of work keeping up with him. At least mom keeps an eye on him and cages him when he starts to get tired and grumpy. He doesn't squeak as much as I would like. He growls back. He is a LOT of fun to play with, but it seems like he is getting bigger by the day. At least I can still get his head in my mouth. When he gets too rambunctious I put my paw on him and flatten him.