Our dog's dog run cable broke and she got loose last monday. She ended up going through my barn, 6 dead, couple injured, and 3 missing. I set another hatch of eggs from the ones I lost and the other birds I have last night. All the dead were hens, only 1 roo missing (younger silver ameraucana). Hopefully this hatch will be better than the previous ones. We haven't had good luck this year with hatching.
Sorry about your loss! Back in 2010, my schnauzer/yorkie got loose, jumped a low spot in the fence & killed 4 of my 5 original hens.
Thankfully, I'd already has some chicks growing out, but had to get some other older layers for temporary eggs.
He's since learned that chickens aren't "rodents, meant to be killed", but I wouldn't trust him enough to leave him alone with them.
I've had a few poor hatches this year, as well, but at least for me, it was due to too high humidity during lockdown.
Even though I did a "dry incubation" the first 18 - 19 days, it would ultimately start to rain right after I filled up the water troughs in the hatcher!
I'm pretty sure that was the issue, since the broody hens had no problem hatching eggs, even some of the hard-to-hatch Swedish Flower Hens had 100% hatch rate on day 21,
way before any of the incubator chicks started to zip.
Speaking of hatching, checked on the broody duck and hen, both sitting on duck eggs, and saw an empty shell! Peaked underneath, and sure enough they've started to hatch.
Depending on how many hatch, I'd debating whether to let the duck raise them all, or let the hen raise a few & see her reaction when they go swimming!
One other duck sitting on eggs, but they're at least another week or two away from hatching.
Then, two more ducks decided to lay in the same "dog crate" under the rabbit cages, and are now sitting on the egg together!
That'll be interesting to see if they'll share ducklings or one will take over.
Never a dull moment!
So, between the broody hens and ducks, there's a grand total of 11 that are broody!