I had two male rats, Oscar and Fred, that I had neutered so they could live with my 8 females...it was the best decision I made! However, it cost me $364 to get both of them done!! That's only because my vet is heinously over priced and charges an arm and two legs for procedures. Most places will not charge you that much- which I found out too later after the fact. He was going to charge me over $1000 to have tumors removed on 2 of my females. After the neutering, I especially loved how my boys did not have "male musk", that pungent odor that is common among boy ratties. They were super duper loveable and lived for quite some time with no health problems! For $65, I would DEFINITELY get him neutered!!