I have two rat terriers that have never been spayed. They never go anywhere without me being there. They both were in heat about a month ago, maybe even six weeks ago. I have seen "false pregnancies" before with the older one, where she "nests" and gets big "teats", then it eventually goes away. Now, with my little one, she has two very enlarged "teats" at the bottom of her belly, and she is being very possesive, nesting, etc. She is even growling at me, which she never does. She won't even sleep on the bed with us, but stays in her cage instead. My question is...isn't this a little late? Keep in mind that I know she is not pregnant. Any expert opinions? Thanks.