I’ve played many matches against AI, and I always manage to find a lot of Gaia sheep around the AI’s base. The AI scout doesn’t aggressively pick up sheep around their base even in high difficulty levels.
The AI starts scouting in earnest after it reaches Feudal age. But in dark age it doesn’t use its scouts as much as it should. But by Feudal age, most of the sheep have been taken already.
Rus scouts also don’t kill deer or wolves. And if I’m playing Rus, the enemy scout will not work to deny me any bounty.