Pablo, a good name! Is he named after Pablo Picasso?
I have two little puppies. One of them is a loud barker too:) she is actually a very sweet and friendly puppy, but she has some issues with big dogs, especially when she is on leash.
luckily, there are a lot of forest trails in the area I live. Dogs can run freely.
A couple of things I found are helpful with her barking problems.
Sometimes I bring some treats with me when I go on walks with them. When other dogs are approaching, I sit her down and give her some treats. This really helps to distract her attention from other dogs:)
Often I forget to bring treats with me. When we see other dogs, I usually lower myself to her level and pat her and talk to her. This seems pto help too. I think she feels threatened by big dogs. When she is on leash, she can't defend herself as well. When I talk to her and pat ger, she feels relaxed and safe.
maybe you can try these things too if you haven't tried yet.:)
Hope you have more pleasant walks with Pablo in 2023! Happy New Year!