Zipties will get brittle after a few years. Mine started breaking after about 5 years. I replaced all of them this spring. That's why there are bags of bark on top of ny run. The plastic panels started blowing off in a December storm. I don't think you need to worry about large birds getting through chainlink. Other animals could squeeze through gaps, or rip it apart. I don't reinforce the chainlink cause my hens free range all day, and don't use the run, and I have very few problems with predators. It's good that you are thinking about it before there is a problem.
Imp
Imp