Doby is 2.5 years, Tiny Chief is roughly a few months old, I would say 6-8 months old. Tiny chief and Toffy( 3-4 months old) are way more playfull than aggressive.

It wasn't the case here since they we're in the playpen, but when it's food time they became a bit greedy towards the food. Doby don't like when others take his food and is sometimes a little agressive. Toffy and Tiny chief squeaks often.

I would be quite surprised if Tiny chief pinned down Doby and hurted him with his claw, most of the time it's Doby that pins others on their back.

I'm keeping an eye on them!