Need Help Dogs Killed My Chicken

Hi! I posted over a year ago about some chickens that my parents had bought and then essentially neglected so I took over. They been doing really well since then until this past week. We had a family member pass that had dogs that no one would take in, so we took them in. For the most part they didn’t seem interested in the chickens and we have them separated by both a wooden gate/door and wire fencing. The other day the big dog managed to bust open the door while I was out there and both dogs ended up attacking my chickens. They did catch and kill one but I managed to fight them off long enough for the rest to safely escape to the coop.

My parents won’t re-home them (for obvious reasons) even though I worry they’ll become bloodthirsty and try again.

Any suggestions on what I can do to reinforce the chickens areas and to ease my worries?

We already have: cameras, an additional monitor gate(added to prevent access to orginal door), wire buried to avoid digging, regular fencing, and concrete in weak points like corners