I HIGHLY suggest getting a hose attachment for indoors! Either a shower head one, or you can also get them for regular tub faucets. (Or getting a hot water line to the outdoor faucet... and a spigot that combines the hot and cold. I haven't seen this since my parents' house, but i know it exists out there. ...but that is a LOT more expensive of a project than the $5 - $20 bath tub faucet attachment.)

I found that Koli prefers a LOT cooler water than other dogs i have bathed, but she still REALLY appreciates that it is not the freezing cold of the hose water. I'd never want to bath in that; I'd never make an animal do the same. (Unless it was a polar bear... but that's a different story.)