One of my older rats Loki has four tiny tumors. She was seen by a vet and she told me she doesn't think their abscess's, just typical benign mammory tumors. Most of my rats tumors start growing quickly and its noticeable. Hers are as small as a pea and none of them have grown even slightly for months. Is this normal? They have not changed and I don't think their abscess's. If anyone has had this type of thing could you share what usually happens? Is it likely that they will stay this small?