My Guinea pig is normally very active and makes a lot of noises however over the last 4 days she has stopped all of this unless it is for food. I thought I found a lump under her neck but haven’t been able to feel it again. She’s booked in for the vets in two days as she’s still eating and drinking I think the vets will say she is okay as there’s nothing physically on her. The temperature is normally where they are staying so I’m abit stuck on what is happening as her behaviour has changed dramatically