I meet kangaroos a lot on daily basis. One of my dogs was obsessed with chasing them (he still loves to but I have more control over him now). A few times he cornered a roo and I had no chance of calling him off or catching him to drag him away. Some of these guys were over 2 metres tall. Roos are cut AF and their claws are as large as carnivore claws. Trust me, you don't want a roo to touch you. Anyway, a stick to keep them at sufficient distance to be able to retrieve my dog was all I ever needed, but to be safe I started carrying a knife too; roo meat is very tasty.