In reply to Neil Pratt:
collies are great but a normal one is abnormal.
My parents phoned me last week, my old collie they have back in the UK was limping..
I told them wait until the morning.. next day she was limping on the other leg..
I took her to the vets years ago, she was very lame on one leg, the vet laughed and said your dog's faking it, collies do, they hurt themselves like a kid does, get attention, then put 2 and 2 together, so carry it on. She now exaggerates injuries.
My parents have my 10-11 year old collie, a 16 year old terrier thing and a world class (supposedly) retired 8 year grey hound (made 3 races and was shit). Only mine still walks every day, the grey hound is the laziest of the 3 by a long way though. But she's happy to be left curled up on the couch.
I'd go rescue, what ever you like, most active proper dogs, especially mongrels, will do 8-15 miles on trails no issue. Those that won't will be happy curled up at home. I have 2 cats now, never come out, but its still fine.Just two brothers in the local rescue. I'll probably get a pit cross next as due to dog fighting they fill the rescue centres.