Yes baby rats can hump each other.
There is nothing to worry about though.
This is just called "bulling".
Female rats can have phantom pregnancies. As rats come in to season every 5 days they are likely to at one stage have a phantom pregnancy. Especially if she is living with other girl rats ( who can indeed hump each other) .. So if your rat is building a nest and has not been near a boy, it's most likely to be a phantom!!
Rats and mice lick and nibble with their teeth to groom each other... they are just accepting you as being part of the group!
Female rats are called a doe, like deer. Male rats are called bucks. Baby rats are called pups, and when they are still naked, sometimes called pinkies. A group of rats together is called a mischief.
they mate like any other mammal
Rats eat Robins, so no, they don't.
Rats, mice and other small rodents.
Yes, when rats are born they each come attached to their own placenta, which the mother then licks off and eats. There is one placenta for each baby rat, but if the mother rat doesn't expel the placenta it can rot inside her and make her sick even to the point of death. Baby rats are connected to their placenta by their umbilical cord. Sources: I breed and research rats=)
I don't think that rats eat each other.
No, rats are predatory towards other small rodents. It would kill a gerbil.
you can rap rats on each other but, they would probably die and a dump or/and kind of smart person would do it ;) -Thanks for you question-
rats...
yes they can as long as they knew each other from birth or when they little