I'm worried about my elderly Guinea Pig (she's about 6)
She is spending most of her time with her head crammed into the corner of the cage.
She's still eating OK and will come over if I go to pick her up and she is happy being handled, but as soon as she is back in the cage she is back into the corner (not always the same corner) Her sister piggy seems fine.
I read somewhere that this can be concerning behaviour in dogs (the head against the wall thing)
Any ideas?
(I'm aware she is an old lady GP)