I was standing outside a touch tank like you would see at a zoo or aquarium, not unlike Stingray Bay at the Phoenix Zoo. In fact, it looked so much exactly like this image, that I'm going to go ahead and say it was Stingray Bay at the Phoenix Zoo.
Across from me, there were a bunch of kids and also a bunch of puppies running around for some reason. Then one of the puppies fell in the water, and nobody on that end seemed to notice cuz there was so much chaos with all the kids and the other puppies. I could see it all from my end but I was too far away to do anything about it, so I started yelling "The puppy! Get the puppy!" So then a little girl understands what I'm saying and reaches in and pulls out the puppy.
All in all, not that stressful of a dream.
I do watch a lot of videos on reddit of people saving drowning animals, and animals saving people, and animals saving other animals, so yeah I guess it makes sense.