Attacks from pets Strength vs Agility?

OK so pets have strength and agility but which one is used for which attack? How do I know which one to put focus on in leveling?

I am working on a greater rocknose and the thing is a freaking tank.

As far as I know (heard from people with Devkit and toys to access stuff such as in-game data), all pets use Strength. Not sure if they get a secondary damage bonus from Agility like human Strength-based weapons, though.