Disgusted and angry....

[Beer can]

Dogs can travel far when they escape, and you might not know you have some near you until they attack.

Like kessel said, dogs travel a long ways in a short period of time. Just because your close neighbors don't have big dogs doesn't rule out dogs, and I'd be pretty sure it's dogs, just one or two could create that damage. A coyote would have taken at least one with it when it left to eat. Only predator I know that will kill multiple birds without eating them is a weasel and that's not weasel damage, they will just take the heads off.
I quite often get two different dog visitors to our property, each one lives over a mile away as a crow flies. They and their owners are lucky the dogs have not been interested in our chickens, just like to pee all over and annoy the heck out of me.
I would have a hard time shooting someone's dog, not the dogs fault it's the owner's, but you have every right to.
I would start by warning and demanding payment for damages. Repeat offenses would not be tolerated though, they would be 'eliminated'.
Trail camera would come in handy, catch the perps in the act with concrete picture proof to show the owner's. I wouldn't accept less than $20 a bird for damages. Time, feed, care, your time, replacements, $20 a bird they are getting off cheap.

 

[tripletfeb]

Not to bring up another animal but could it have been bobcat? OP said they had bobcats in the area too. Print can expand in mud but I'm no expert, just questioning.

 

[MyChickenShack]

www.raising-chickens.org/chicken-predators.html
This article may be helpful in identifying the predator but I'm in agreement with those above who think dogs. I have a Norwegian….she is a great dog. Great around kids, super friendly, loves to get petted, but she also likes to hunt. I have tried shock collars, but she just loves to hunt...her instinct. She has killed a few of our chickens in the past and would drag them to her dog house or she will just sit and guard the dead chicken where it is. There was never any body part missing or anything. It was like a game to her, as another commenter mentioned. Since then we have learned how to balance everything out to prevent this from happening again. Its an unfortunate part of having animals and free ranging (which we do also) I am so sorry for your loss...I know it is frustrating to lose your chickens and the time you have invested in them as well. I wish you the best as you continue your chicken endeavors.

 

[Birdsong 82]

You would be surprised at the rIke’s in some areas. About a year ago I had a pack of six dogs come into my yard when my daughter was outside my daughter saw them and one of them growled at her. A very big blood hound There was a beagle a couple different hounds A black lab and some kind a very small dog is what she said. I was at work and she called me. When she called me she told me she was trying to find the chickens to protect them and I told her get in the house now I called animal control and my mother-in-law she went over there and met animal control since one of them had an orange collar he said there was nothing he could do about that that they were hunting dogs. She argued for a bit but then the dogs left. Animal control said if they’re hunting dogs there’s not much they can do. If they cause any of my animals harm I can call them back then. Now that just doesn’t make a bit of sense to me I have to wait until they kill my chickens?! Only one of those dogs had a collar. None of them had any tracking collars and only one of them had one orange collar. That’s the weirdest pack of hunting dogs. Luckily the dogs ignored my chickens but the point is some areas have the worst rules.

 

[Birdsong 82]

We were lucky. My daughter said after they left she saw the rooster on top of the SUV and he crowd and all of my hens Came out from underneath the suv. We got lucky but it sounds like yours didn’t even hear what was coming.

 

[Birdsong 82]

Believe it. Many years ago a black lab showed up and killed the major portion of a free range bantam flock here. I was away on vacation, and animal caretaker caught the dog - actually a very nice animal. Animal control requested that I file a formal complaint as this was a second offense for the dog. Lack of owner responsibility was the real problem.

I do believe it it’s just hard for me. I’ve talked to too many people that I’ve had this kind of thing happen. If you know your animals are capable of this I just don’t understand why you can’t be more responsible. My dogs can roam our property freely. They have been trained where the property lines are in do not leave. I think they’re too scared to leave. Also my dogs have been trained around all kinds of different animals and very gentle with them all. Are usually blame the dog owner. It is their natural instinct

 

[Kessel23]

That's odd, what's stopping someone from putting orange collars on their dogs and letting them go free to annoy the neighbors? Also, that is the dumbest hunting dog pack I have heard of, I wonder what the heck they were being used to hunt, you have the lab for retrieving birds, hounds for holding an elk or large animal, and then some small dog for killing rodents?
When my dogs have gotten out the roosters lead the majority of hens to safety too, that's why it would have needed to be a large amount of dogs that killed the OP's flock. They would need to fast enough to get in their and kill all the birds before any of them had a chance to hide.

 

[Birdsong 82]

Don’t think they were really hunting dogs. Good excuse for animal control to do nothing. But that’s a crazy rule!! Don’t know where they came from and never came back. But had they been in certain area of yard and the dogs wanted them I may not have been so lucky. Sounds like The problem OP had. But roosters will warn and try to protect but usually also pass in process. So sad. My rooster ( my avatar) is the best!!!! Beyond loyal and dang handsome!

 

[Birdsong 82]

Not to bring up another animal but could it have been bobcat? OP said they had bobcats in the area too. Print can expand in mud but I'm no expert, just questioning.

I had the same thought at first. They can do some damage But I feel like there would be more eaten than that

 

[Tesumph]

Not to bring up another animal but could it have been bobcat? OP said they had bobcats in the area too. Print can expand in mud but I'm no expert, just questioning.

The tracks are way too small and.. well, not bobcat shaped. A lone cat wouldn’t rampage like this and leave everything behind.