You make more dogs that probably won't find a forever home. Plus I think depending on the size difference your female could die from it.
Female cats in general, regardless of size, are called queens or she-cats. A pregnant female cat is called a molly.
No, she is just horny about the rat next door.
With a guppy you need to look at the gravid spot. This is a dark spot in the fish's belly. A large gravid spot indicates the fish is likely to be pregnant. You can tell how pregnant the fish is by how large the spot is. Sorry I have no experience with other species.
Sounds like gynecomastia. You might have had some breast growth. It happens to almost every boy but not usually enough to notice. Has it gotten worse overtime? It could be a hormonal imbalance.
My guinea pig had babies. She was in a cage with another female. She came from the store pregnant. She became quite large in the back. Most of the time if the guinea pig is pregnant you can lightly squeeze her sides. There then should be some small kicking or other movements. ---- That seems a bit normal though, my female guinea pig looks a bit like a pear too. But just to be safe you should check her, also, I read that if a female guinea pig is pregnant then it won't like being touched on its stomach.
The yorkie is the female she is quite small. I just want to make sure she will be healthy enough if she does end up pregnant
The female guppy will be very large and will have a gravid spot near her anus. But when she is ready to give birth she will be very still and huddling near the heater in your tank.
It should not be done purposely, but if it did happen, the female Jack Russell would have to have a C-section to be able to have the pups ... they would be too big to birth naturally. It would also be dangerous for her to be pregnant with pups of a much larger dog, but if she were to get pregnant with only a few instead of several, she might be OK. The pups would be medium-sized dogs ... not as small at the JR, and not as large as the collie. Anyway, because of the danger involved to the mother and subsequent pups, purposeful breeding between these two should never be done.
She looks large
large stomach.
Aral Sea
A fish which happens to be particularly large.