Nuk is very social with other dogs from going to doggy playgroups from a young age and regularly going to daycare, but its totally a personality thing. He is way more wary of other people, especially men since he has only ever lived with women but generally only gets upset when he's "guarding"the house by barking at people walking on the sidewalk.

I'm glad that Kylie has a buddy like Watson to play with. Border collies are such a smart breed that it's tough to give them enough attention on your own, so those too can keep busy together haha