Can male rats get testicular cancer? If they do, that would be a good reason to advocate it with healthy rats if the owner is financially capable and has a vet that is experienced. Plus it's not nearly as invasive as a spay would be.lilspaz68 said:I wouldn't neuter a male rat just for smell issues. If they become hormonally aggressive or you plan on housing them with females then thats different, but just because you might not like their slightly musky smell? No.