I'm hoping someone can give me a bit of advice as I'm not very experienced as a pet owner. One of our dwarf hamster pair (a year old) has developed a large lump where one of her legs joins her body.
She is eating, drinking and moving normally as far as I can see. A bit of net research suggests it is either a cyst or a tumour. My inclination is to do nothing for now as she doesn't seem unwell, but what do you wise people think?
Many thanks!