No Horns vs Horns & Overheating

[Kat]

Corresponded with a goat rescue place, and they are pretty strong about not use disbudded or polled goats for packing because of overheating issues. I have one polled goat who hasn't carried yet but showed no sign of heat distress hiking in summer heat last year, and one disbudded goat who does overheat at times but his coat is thicker (am going to shave him.)

What is the general experience here?

Thanks for any input.