One of the "old wive's tales" that I have come across repeatedly over the years is 'that if you keep your dog as a household pet, it will never make a good hunter in the field'.
Let's debunk that theory right now! I personally had a gyp (that means female) terrier that I hunted for 16-years and she was thought to be one of the very best by many.......oh, and she never slept outside for a single night in her entire life!!
I've seen gundogs that were absolutely brilliant on upland game and owned by lady hunters that lived in apartments. Lisa Ann Londe owned a Chesapeke Bay Retriever that never left her side in 10 years. Lisa was a crack-shot and along with her Chessie they would win 8+ trials per year for 7 years in a row. They both lived in her condominium, but were out every single weekend either trialing or hunting. It all has to do with giving your dog many chances to use his instincts and refine his craft.....and conditioning is tantamount to getting out!!
Currently have 4 dogs that work and they all live in the house with my wife and I.......every weekend, when I start putting on the hunting clothes, they know......and there they are - dancing and pleading to go again. The dogs never fail me, I just give them the chance to do what they were bred for.
As far as I know, they probably think that they live in a really fancy doghouse!!