UngeheuerLich
Legend
That's fine of course as a house rule but the help action in combat RAW does not require an attack or threat to help. It specifically mentions directly "feint, distracts the target or in some other way... "
The rule requiring both parties involved to be able to do whatever it is on their own is in the broader scope "Working Together" section in the chapter on Ability Checks, not the chapter on combat and attack rolls.
This is but one of many cases of how ability checks and attack checks play by different rules.
Maybe or maybe not. You could rule either way. Your interpretation might have more supporters but the other one is not without logic.
If you tell me about the distraction i might grant advantage. In some cases I don't see how the owl can help except by hanging around the target opening itself to counter attacks.
5e has fiction first rules second. You can't attack when you don't have free hands or a weapon. Likewise you can't help if there is nothing you can do to actually help.