lump on neck

Hi all, I have a (nearly) 4 year old female called Ginger, the past few months I’ve noticed some changes in her: the whites of the her eye coming over into the colour and a small lump along her spine (near the rib cage). I’ve had her out today and I’ve noticed her nipples have some sort of...

As i was recently just chilling with my guinea pig i noticed she had two hard lumps on her chest and on her neck (i feel bad because I'm not sure how long she has had them!). She is about 5 years old (so an old guinea pig) She eats well and poops normally but she has started to look a bit more...