sgprescue
Mama Doe
Tree - did the vet stick a needle in the lump to see if he could get anything out? Is the lump still getting bigger? As I said on the phone the other day it is not uncommon for a guinea pig to develop a benign lump. Personally if it was my pig I wouldnt have him operated on unless the lump was growing rapidly. Have you considered taking him over to the CCT in Huntingdon for an expert opinion?