Rats emit a high-pitched squeak when around another rat, seemingly just to express a positive emotion By Christa Lesté-Lasserre 7 November 2023 ...

During social interactions, rats make ultrasonic vocalizations, imperceptible to the human ear, which reflect their emotions. For example, when happy, they tend to emit squeaks at about 50 kHz.

Rats like to feast on protein-based foods such as meat, fish, cheese and pet food. Although mice do eat cheese, ... If you hear chirping and squeaking in the walls, ...

If you want to prevent a rat infestation, read our tips on preventative rat control. ... Squeaking or scratching sounds in the walls, basement, attic or other spots are also tell-tale signs.