4 months old?
Life should be a glorious game, not one full of BORING BORING BORING BORING 'OBEDIENCE'!!!!!!
Take off the darn prong collar and instead get out the treats/clicker and start teaching him GAMES!!!
The GAME of 'sit'. The GAME of 'down' . If you teach it as a fun game with a real REWARD (not a punishment already!!!!!!!!!!!!!) he'll be offering you a sit/down/whatever faster than you can even think about what you were wanting him to do!
What you SHOULD be teaching a puppy (please read all the link) ---> Top Training Expectations for Puppies
I don't even have a LEASH on my puppies, let alone a prong. I want them to WANT to be with me to listen and learn new things. If I am not even able to keep their attention and focus (in short session) then the problem is ME and what I need to learn. Not about controlling and forcing my pup to do something.
Better to spend way more time socializing my pup and having them comfortable in any new situation. And getting that bond with engagement and positive training.
MACH3 Bretta Lee Wildhaus MXG MJG MXF MFB TQX HIT CGC TC
Glory B Wildhaus AX, AXJ, XF
"Behind every great man is a woman rolling her eyes." - Jim Carrey