if there bothe at hunting weight mate this will happen,i no from experience i had 2 harrises at fat weight together for 12 months,ive had birds of prey for over 25 years but i left them together at a distance apart on the lawn tied down to return not long later to find my male headless and all his chest feathers plucked,you learn everyday in this sport its a hard lesson to learn i feel for you bud it nearly made me pack in