This variant of Owlbrow is much harder than the original, it has over 16 times the health of its predecessor, has longer range than a lot of ranged attackers, and over double the attack power. Additionally, it can knockback and slow your cats. This enemy can be a pain, particularly in Elite Corps, where it will interfere with your efforts to kill the mighty Mega Cat. Another notable difference is that it has 2 knockbacks, so you can tell when this enemy has below 50% health.
Decent meatshielding will be needed to stall this owl while a stack of ranged cats does work against its massive health. Anti-floating cats with good range like Kotatsu Cat, Nurse Cat, or Sodom can effectively control it. Even then, sometimes they'll spawn in swarms, proving to be a dangerous threat.