Aiko

Then book the vet rather than carrying on checking. Selectively avoiding hard food plus a squeak on biting is close to a diagnosis in a two year old hamster, and a tooth trim is a straightforward job. Leaving it is where it stops being straightforward.

Eating is the one activity where mouth pain shows up first, so a squeak tied specifically to biting hard food is the version worth taking seriously rather than the version to shrug at.

Hamster front teeth grow continuously and are kept short by chewing. If they get too long, grow crooked or break, biting hurts. The pattern to look for alongside the squeak: dropping food, picking something up and putting it down again, going for soft things and leaving the pellets, a wet chin, and weight coming off.