Myself and my girlfriend have owned a male and female mouse for about 10weeks now. Emery, a beige and white, rather docile male mouse who loves to spend around 2 hours a day on us. Jupiter, a brown, very quick mouse who loves to run on the wheel all day.
When we first put them together the male was constantly trying to hump the female. The female wasn't fond of this and would always run away while squealing. In the time we have had her, she hasn't fallen pregnant, yet. Now the tides have turned and last weekend I went in one morning to find that the male mouse had sores all down his tail
. As soon as I opened the door he ran out in a flash into my hand, and from then on has refused to go back in the cage with her. We have kept him in a temperary cage by himself since with the odd experiment putthing him back in. As soon as he goes in he freezes and tries to run out straight away. One time we closed the door and kept an eye on them. The female came upto him and sniffed his bum and then flicked her tail like crazy and chased him and bit him (she is ALOT quicker then him). Since then we have kept them seperate.
Now the question is. Why would she be all of a sudden so aggressive to him? Could she be pregnant and acting a little territorial? Will it pass over a short time or will she be like this for the rest of her life?
Hopefully you can help me.