I use full sized clippers that I got at the beauty supply,and hold him up on his hind legs and just trim the penis area,never getting close to the tests,he was shaved one time at the groomers and went crazzy when it started to grow out on the balls,now I leave them alone and just get the poop area and the penis area, I even use the same clippers on the female,encluding thier ears,have not had a problem with the full size,but maybe because I learned to use them years ago on kids heads
