Excellent pet for leveling up your entire pet lineup. If you have multiple pets you want to bring up, Blood Owl gives passive XP to all, so it multiplies your effort.

Particularly good for AFK or idle gameplay: even when you're not actively doing tasks, your pets can gain XP just by having Blood Owl active.

Because its effect scales with its weight (somewhat), having it aged / leveled / “huge” enhances the bonus. So don’t neglect feeding and aging

Pair Blood Owl with other XP boosting items/pets (e.g. treats, toys, etc.) to amplify total XP gain. It stacks with other bonuses.