My large plains female is getting old. I bought her in 2001 and at that time I think she was 2 or 3 years old. So that means she must be 9 or 10 years old. Last year she gave birth to 55 babies, 2 died and the others were doing very well !! And at this time she also gravid and she is doing excellent. She is very active, eats a lot and looks very beautifull ( nice deep orange stripe) and she is 47 inch.