Lots of good advice in the comments above. I would repeat that it's not a good idea to put a bark collar and that young of a pup. When he's older if you choose to use it, it will have no effect on IPO barking. We have club members who remove theirs from the dog's neck literally when they are taking them out for their protection session. They use them so the dogs don't bark themselves out before it's their turn. When they get on the field and see the blinds, trust me, there is no problem barking.