When do you call it quits?

I wish I could help man,, but over the yrs I have seen numerous times where I have given young dogs away to folks that ended up turning into what I knew they had in em.. I personally just dont have the patience to deal with slow learners.. My son on the other hand reminds me sometimes when I want to drop the hammer on one,,, How I have made mistakes on ones in the past.. LOL.. I cant tell him that hes wrong ,,cause he aint BUT,, I personally rush judgement sometimes .. Its all in the eye of the guy who is the dog owner,, if you can feed him than you do you .. Wish you luck with him and I say it all the time.. If they understood english we could whisper in their ear and then they would know the plan that we have so they would listen better.. LOL>>>