well they don’t sweat from most of their bodies like humans, so there’s not going to be facilitated evaporative cooling by shaving him. Also, there’s something to be said for a light coat (at least most of his coat) reflecting sunlight off the skin as well as an insulating layer of fur a-la a camel. I honestly don’t know the numbers (or if anyone has studied it) for shaved vs non-shaved.
What I do for my idiot dogs (two labs and a thick undercoated German Shepherd) is to make sure they’ve got a kiddie pool and shade when it’s warm. We regularly get 100 deg plus weather in the summer, and my dogs do fine outside when they can’t be inside in the air conditioning. My labs will go in the kiddie pool to soak for a bit, and the shepherd will dip her feet then go sit in the shade.
