Letting a puppy meet every other dog possible on leash is not good socializing.
Unstructured puppy playdates with a lot of puppies in a relatively small pen without decent monitoring of behavior isn't good socializing.
It's more important that a young puppy learns how to learn, and that it's fun, and that you're fun, than they learn specific behaviors and manners to 100% reliability ASAP.
Try not to panic and stress and obsess over every little thing ("is it normal for puppies to hiccup?!!?!") so much that you can't enjoy the good parts.
Unstructured puppy playdates with a lot of puppies in a relatively small pen without decent monitoring of behavior isn't good socializing.
It's more important that a young puppy learns how to learn, and that it's fun, and that you're fun, than they learn specific behaviors and manners to 100% reliability ASAP.
Try not to panic and stress and obsess over every little thing ("is it normal for puppies to hiccup?!!?!") so much that you can't enjoy the good parts.