I kept rabbits years ago inside a chicken wire hutch. Came out one morning to the massacre your worried about and yes the wire was attached very well. I’m guessing the culprit was either a fisher cat or raccoons. My chickens now reside in a very solid coop with a run totally enclosed in 1/2 hardware cloth and the bottom four sides are buried 18 inches deep. Six years now and nothing has gotten inside. Worth the peace of mind.I don’t know if anyone can really help me with this. But do you know anyway to convince my dad not to put chicken wire on the run. He said that over the years nothing has ever gotten in our old run during the day so it’ll be fine, but I am worried I’ll come out one day and find a crime scene.