RE: Training Question
My opinion, No they cannot be ruined by being in the house. My Lab is both an inside and outside dog, he actually sleeps inside with us, and this was his first year hunting and he did great.
You are using sent so the dog will at least have an assosiation with that sent, but he/she will also hunt other birds. Mine will point rens, Cardinals, chase tweeties. But to answer your question, can the dog be trained to hunt only one type bird? I don't know, Mine had been on quail, Chuckar, Pheasant and waterfowl already. The more experianced folks will have to answer that. maybe ask in the hunting or sporting dog forum.