Rocky's Surgery

I took Rocky to the vet, and she said his lump needs to come off. He's scheduled for surgery on Monday (April 14th), and we'll find out that day whether there is enough concern about it to warrant doing some lab tests. She said the lump had some discoloration she was concerned about. I hope it's okay to pray for guinea pigs, because that's what I'm doing. I've gotten kind of attached to him.