I would like to see dog parks when the layout makes it practice divide the area into large and small breed areas. I have owned both large and small breeds and have always been realistic about the risks and about taking ownership of my pets behavior. I think it would greatly reduce the amount of stress on the dogs and the owners. No mater how much you want to ignore it when large breeds get to playing rough with small breeds it usually ends in either the owners or the dogs getting the worse of it. The owners get defensive and the pets are to losers. If we can not divide I think it fair to ask those who know they have aggressive animals to keep them muzzled until they leave public areas. It does not impede the pets play or drinking and can save another pets life. I have been to several other cities around the Bay Area and it is working very well there. Sincerely, Kevin