no dog ''needs'' to be in kennel you can keep them where you like, personally all of mine are outside
though i would a Imagen after a days hunting a filthy mucky dog is not the cleanest thing for a house, unless you wash the dog after a day out ?
but its every man for himself don't think it will affect working ability, maybe the the dog might be more accustomed to harsh weather or temperature, just a taught
at the end of the day the decision is up to yourself good luck with the dog
personally i keep mine outside but to answer your question they are washed cleane