Okay, my 3-4yr old nigerian I believe is pregnant. I don't think that her utter would start filling up and getting bigger for no reason. I did see the male get her in May. What is confusing is that she goes over to the billy pen now and sits by the gate and the billys do their bucky thing. I let the 5 month old billy out with her and she had a standing heat. She let him get her. If she is pg why would she let a billy do this? A friend told me that the billies will go after does esp. during rut regardless of the doe's situation. That I can understand but why would she hold still and let him? It's been day 4 now and the billies are still acting the same way around her.