I watched a dog really struggle on a walk today. Its back end kept collapsing, and its legs looked really weak and limp. The owner’s child tried to pull it to its feet by its tail. I told the child not to pull it up like that. The owner shouted to me that the dog has arthritis and is fine once it gets going. It made me sad to watch the dog get dragged along. It collapsed down a few times. I felt so sad for it. Is this normal for dogs with arthritis? I’ve never seen a dog out in a state like this before.