4 month old lite growling at correction
Yesterday and this morning I was doing some training with Franklin. He's a few days shy 4 months old. I have one our kids hula hoops that I throw and he chases. Before I do, I give a cycle of commands in various order. Sit, down, stay, or sit and stay, or down, up, sit, stay. Then I'll throw the hoop, tell him to get. He goes.
Sometimes, he won't follow through with a command. I'll do verbal and hand signal, then verbal as a last chance. After every successful follow through, i positively mark it. If he doesn't by the second, I give a light correction with the prong collar. It is seated properly and is not loose, not super tight; snug. As I give him the correction, I will make the no noise. Sometimes I have to up the correction a bit and he lets out a lite exasperated growl, then follow through with the command. He hasn't yelped, so I assume the correct amount of pop has been given. He's just defiant it seems. I positively reinforce his follow through.
Why is he growling? Is it something to correct also be concerned about? Is there something I may be doing wrong that I shouldn't?