my older guy got trimmed by me. I work at a vets office, and I would just use the clippers to basically rake over the coat to thin it a bit, trim the pantaloons, and between his pads, and then I would shave him naked ( surgery clippers) all under neath. From inside his thighs , to between his front legs, going a little up his sides, but not much. His coat would look normal until he layed down. Kept him cool on the tile for sure!