My opinion is that working dogs who are kennelled outside are so keen to work BECAUSE it's the only attention they get............. as they are not constantly in the house, with their "people" - they don't get nearly as much attention as a house dog would - so therefore, they are mega attentive when they do get attention.
Btw I am not just referring to gundogs, I include lurchers, and also film / tv dogs that I know which are also kennelled. In the long run, in my experience, it's doing them no favours, I have seen many kennelled dogs that have developed little behavioural issues mainly as a result of boredom. What happens when they are old and arthritic - will they still be kept in a kennel - heated or not it won't be comfy enough for an oldie.
Why people get dogs and keep them outside, beats me ? what did you get them for ?