Answer: This moment of pure awesome!

I really thought either the dog would get aggressive or the kangaroo would go on a kicking spree, but no.

They're getting along just fine! The best part is towards the end, when the dog goes for the belly rub!

From the owner of the pets:

Blue the roo and Trooper my rotty pup, best of friends. This video I would like to share with you as it shows an amazing relationship between two species. I hope you enjoy it.