What does it mean to be a responsible dog owner in the hills with an enthusiastic young dog? Wildlife Guide Lucy Wallace is finding out. Meet Nuis… a yearling border collie with a big heart. He is officially a Good Boy, but there are two things that he finds really tricky: walking nicely on the lead (more on that shortly), and not chasing stuff. Nuis will chase everything. This includes (but is not limited to) bikes, balls, deer, other dogs, cars, leaves, cats, squirrels, birds, people and I’m sure if he could get the chance, sheep. He’s fun loving, impulsive,…