hi everyone,
I'm having some troubles potty training my new puppy Apple. He is 2 mo old and copying his brother Chuck, who is %100 pee pad trained.
The problem is he sometimes pees right next to pads, not on them. And ones in a while he pees on the carpet even though the pads are right there

I never had this problem with Chuck, I don't know what to do about it... It has been only 3 weeks since he arrived and I know it's still early but I just wanted to get some opinions...
I'm considering littler box trainig and putting the pads inside the box but I don't wanna confuse Chuck

Thank you