Play area for pets

Recently I visited a public park named Nelson Park in Vancouver downtown. Usually in parks we see play areas for children, but alongwith childrens' here I saw a play area made for pets(dogs). It was really amazing to see that. All the dog owners were busy introducing their pet-dogs with one another's pet-dog and and then all the pets playing some ball or dics games with each other. It was a very nice view to watch.