Dog got ahold of my chicken…

So today the worst thing happened and I feel so so awful. I have six 12ish week old chickens, it’s my first flock of my own. Lately they keep escaping the run even after I have raised the fencing and clipped their wings. I have no idea how they are doing it. I also have 7 dogs. I ALWAYS walk out and check to make sure none of the chickens have escaped their run (it’s 350sq ft and has 4ft fencing all around) before letting the dogs out and I stand and watch them while they run around. Today I forgot to grab a water, it’s hot here in Arizona so I walked back inside for 30 seconds to grab some. I go to walk back out and somehow one of my dogs has one of my girls. She seems physically fine other than some tail feathers being ripped out. She’s walking and eating and drinking but I’m still SO worried and I feel so awful that I took my eyes off the dogs for even a second. Is there anything I should be looking out for involving like internal injuries or shock? Picture of Clover after the fact. And the criminal in question. >:( sorry for the long post it’s kind of a vent. 🥲