We have 2 black labs with a little bit of collie (1/8th) in, Shadow and Echo, brother and sister age 10 and 6. Look like full labs but amazing at agility, people are surprised at their ability to twist over the jumps like collies

they don't really work but echo the girl will foster any orphan going, love it, clean it and sleep with them. Speciality is orphan bottle fed lambs in the spring, she's speyed and never had puppies but has an amazing maternal instinct. Shadow is used for any school or nursery talks we do at work (vets) he'll safely and happily lie in the middle of a class of 30 children with each child stroking a different bit of him. Worth his weight in gold.
Love them both.