I have a 5 month old puppy who has been enrolled in puppy classes for the last few weeks. The puppies have not interacted up until this past lesson. My puppy has been doing well in the classes, they're able to settle and watch the other puppies. They will occasionally bark but more out of frustration/boredom towards the end of the class and not more then any other puppies have done.
This last lesson was a bit of a disaster. It was the first lesson where they were allowed 5 minutes of off-lead time paired up with one other puppy. For some reason in this lesson my puppy kept barking at the other puppies during the normal part of the lesson, so going into the off-lead exercise they were already not in their usual mood. My puppy kept backing away from the other puppy, barking, growling, jumping back. I found it surprisingly upsetting. I've had a reactive dog in the past and I think I'm worried this is the start of that happening again and that I must be an awful dog owner to have two dogs end up like this.
The leader then told me to put my puppy back on their lead which I did, and they then told me I was holding the lead too tightly (my puppy was lunging forwards so I was holding her back) and I was stressing my puppy out. I didn't know what else to do in that situation, as she was on a short lead that she was pulling away from me on.
Puppy has been socialised since I got her, she's only been allowed up to a few dogs (older, calmer dogs) as our the puppy class leader has advised. I don't have any friends or family with suitable dogs to introduce her to off-lead. On walks when we see other dogs I give treats for her when she calmly watches them walk past.
I'm really nervous this is going to be the start of reactivity or I'm doing something really wrong.