Took the kids (3&4) to a big field earlier to have a picnic and play in the park which is part of it (not fenced in at all) saw a few dogs with their owners, kids got to pet some animals, no problems. Then as we sat on the grass in the park area, out of nowhere three larger breed dogs run up, saw them coming for the picnic so hurriedly threw the food back in my bag and tried to get the kids standing so they didn't get trampled on.
The kids were fine, the dogs very excited and literally nose in my bag and eating the food whilst I try to get the other two to stop jumping at the kids. In the folic both of our balls were popped by the dogs and the (older lady) owner comes sauntering up around a minute or two later which felt like ages battling to get them down, and I was pretty pissy as she tried to get them under control and said they've eaten some sandwiches and popped the kids balls. The owner then started hitting the dogs! She was stood hitting them as one had its nose still in my bag and the other two as well as they were still jumping up, immediately I felt awful! Said it wasn't the end of the world (kids weren't too bothered) and when she offered to pay I just said it's fine we have more at home.
I guess my aibu was not to say anything about the way she handled it? Since when has that become a thing? Not a dog owner so feel free to roast me for judging but 
Feeling really bad now, if I hadn't spoken all pissy she wouldn't have gotten all aggressive with them. We live near farms so it's likely they could have been working dogs, not sure if that even makes a difference?