I don't know how to link to videos on my blog, but you'll find it if you scroll down to the end of this post:
Vickan och Myrrhas sida: Sol!

It is my two dogs playing. Lyle, the Border Collie cross, is 5 years old and Chansa, the Belgian Malinois puppy is about 4 months old in the video. It's interesting to see that he tells her off, but he's not at all as violent as some people say that dogs are to each other.