I am the proud owner of a pitbull mix and a little maltipoo (polar opposites indeed)! Just wanted to share a product I stumbled upon recently. When I take the dogs to the dog park, most people assume my pit is going to be aggressive and mean and my little is going to be jumpy and friendly. They are the complete opposite. My pit is very loving and friendly and my maltipoo is a bit standoffish around new people. I bought two tags from idogtify.com recently. One that says "Friendly" to clip onto my pit and one that says "Caution" to put on my maltipoo. Helps save me my breath every time we venture out. Just wanted to share - it's been very helpful!