Sorry to hijack this thread, but your 1 year olds are 3-4 lbs? My BST turns 1 this month, and she is still very small, I think. I don't have a working scale at the moment, but I can't see her weighing even 2 lbs at the moment. I picked her up at a show last October, and she was pretty skinny, but has since plumped up but not to the scale of your snakes.