i would never surgest shving a breed like a gr personaly theu would look terible there are some breeds that pull it off and other that dont a golden should be fine in the heat it is right about it helps them to stay cool in the heat i had a flat coa croos basicly a black golden and iv got a lab and a full coated lahasa all do fine in the summer
rember to keep the dog brushed so there isnt any dead coat in there so the air can curclate well trimm the hair out from the pads as the feet help controm lots of the body temp i do shave out my lhasa belly so when he lays on the floor it keeps him cool also shaving the dog down with increse the risk of sun burn which then can lead to sun stroke then of corse death and it happens fast
my boss who used to keep the newfys used to have a paddling pool and when it was hot they would lay in it
also if u shaved ur dog u would need to keep doing it usally as they coat grows back wooly and thicker so then it will get hotter like if u shave ur hair gets thicker and fuller
one of the best ways of keeping a dog cool is just draping a wet towl over there back for 5 mins cools them right down grate on those summer scotching days