STYLETHREAD -- LET'S TALK SHOP!

As long as you get an appropriate leather, it's nearly indestructible by dogs.  My in-laws have two huge labs and leather sofas, and the sofas look brand new still after 4 years!  Most places also offer a warranty that covers any rips.scratches in the leather, so if you're still concerned you could always purchase that when you get your sofa.

I'd shop around before you buy to make sure you're being shown the same sort of leather at each place - when you see the leather samples, try scratching them hard with your fingernails.  If it leaves a mark, that's not the leather for you!  The ones that will be the most durable are the ones that you should be able to rake on over and over and not see a scratch.  If you can find one like that, leather is perfect for pets because it doesn't pick up smells and can be wiped down for cleaning.

What we do to keep the hair down on our (non-leather) sofa is keep our pup on her own blanket - it matches the color of the couch and is made of fleece, so the hair sticks there and not the couch.  That way all I have to do to remove the hair is take the blanket off and stick it in the dryer for a few minutes, instead of vacuuming/lint rolling the entire couch.  Maybe that would work as a temporary fix?