Having slept on it, I see a couple of you beat me to it.

The Gunns and Mackays ran hot and cold, but it was the Keiths that really got the Gunns' charged up.

The first clan affiliation of which I became aware for my family was Gunn, so I did a little bit of reading. It's pretty safe to say that they didn't work and play well with others. From what I read, it sounds like they were a chihuahua that wanted to be a rottweiler -- a small clan with limited resources that tended to bite off more than they could chew when it came to trying to compete with their enemies.