>>They will kill a dozen cows in a day in a pen and not eat any of it.

To be honest with you - I don't even know where I'd begin to look for stats like these - have you got any links I could read?

I was only really able to ask Gemini about it which seems to confirm that wolves generally don't kill animals for any reason other than sustenance but obviously LLM so I accept it might be fully wrong - https://g.co/gemini/share/e1ce79cd97de