I'm curious too. My best advice is to document and get pictures of everything. If you have a smartphone have it on you so you can photograph, for example the dogs in your yard. I don't know if I could ever find the thread but a BYC member posted several years ago of a neighbors dog that kept...
I do have electric wires around my coops and pens, good heavy duty netting covering all of the pens and concrete under the gates, all due to losses from predators in the past. Nothing gets past the hot wires and anything that touches them will hurt for a couple of days. I want anything that...
So sorry for your loss. You have gotten a lot of good advice. I would report the incident to animal control and take a lot of pictures especially of the dogs in your yard. Not knowing your situation and if your yard is fenced and how the dogs are getting in. I would first go that route and maybe...