My border collie, badger runs most days with me. He will do 8 miles tonight easy
Cant speak for every collie but badger always has to be ten yards in front and is constantly checking my whereabouts. ( im told bitches do this even more).
He knows every single part of each route we take and It seems that he has come to think that this is part of his job. He seems to want to guide me around our runs.
He doesnt chase so Ive been lucky in that respect.
But if you have one that chases this can cause problems with animals, particulary horse owners.
Most of the farmers and horse owners on our routes recognise badger and now see there isnt a problem as he just plods on past.

Id def recommend a border collie but try and get one from a rescue centre. I considered the pros and cons of owning a dog for 2 years before I decided.
Id say badger runs about 30 miles a week with me. he is nearly 3 now