Rats Can Sing Songs?

Researchers have found specifically when rats are tickled, they make ultrasonic chirping noises like a little rat giggle. They also show other joyful responses like wiggling around and they will chase your hand around to be tickled more. In addition to the giggling, there's also something that they do called Bruxing. Have you heard of this? Oh, yes. It's their teeth. You know, it's so cute. Well, this rat tickling thing is actually being studied now as something to increase lab rat welfare. No way. Because you have to impride enrichment for them, you know, they're still animals are still and want to.