I have been reading through the forums looking for the answer to this question and have not found it so I thought I would ask.

I have started a colony of both rats and mice. They are both colonies of 1 male to 3 females, the room temperature is between 70 - 80 degrees and they are housed in aquariums, 55gal for the rats and 30 gal for the mice.

Now my question is this, how do I tell if my animals are pregnant?? I have not witnessed any breeding in the rats at all. When I bought them I was told that 2 of the female rats may be pregnant already, but I do not know how to tell for sure.

The mice showed some sporadic breeding activity in the first few days but for the last 5-7 days I have not seen anymore activity from them.

Thank you in advance for your help.

[ Hide Replies ]

• How can I tell if they are pregnant???????????? - timopar, Sat May 17 18:32:54 2003
• RE: How can I tell if they are pregnant???????????? - Sonya, Sat May 17 20:30:09 2003
• i dont know about rats, but the mice.... - fcwegnm0, Sun May 18 12:30:25 2003
• RE: How can I tell if they are pregnant???????????? - kasper22, Sun May 18 15:45:49 2003