The leash training - I've done that with my ESS as well as teaching him to walk at heel w/o the leash. I can see why some do not like it - if he's not finding birds (or gets tired) he'll stop hunting and walk at heel. He needs to be told to start hunting again - not the end of the world - but not ideal either.
Exactly. I live in the city so leash training wasnt an option - he needs to do it. My leash use is minimal but he still needs to be able to be leashed at times and when he is I expect him to heel as if he was off leash