Our vets charge 49.99 regardless of size. My bil dog scooby also only had one testicle in the right place, so he went to be castrated and they had a look for the other one, cutting him open quite a lot.They decided that it was safer to close him up rather than keep looking as they had no idea where it was and had already cut him about 8 inches looking! When he had recovered from that he had to go up country somewhere and have a scan to pinpoint the missing testicle! When he had his second operation they knew where to look but he still had to have a really big cut.The ops and the scan total came to over two thousand pounds!!!! thankgoodness they were covered with pet insurance.
Good job your boys is just inside ,but it still probably makes the op a little bit more difficult which all adds to the cost.