McChooky
Free Ranging
X2!You probably can't get this set up in the next hour or two, but for the future:
an electric fence around the outside of the chicken pen will stop dogs doing that. It's not as much fun to run around something that shocks when they touch it, and they won't be pulling chickens partly out through the wire if they get shocked each time they get close enough to touch.
Are you able to move the remaining chickens somewhere safe? Maybe into a box in your house until daylight? If the dogs run off when you come outside, this might be possible. But if the dogs just keep doing it while you yell and make noise, then call the police and say you fear for your OWN safety, because those dogs might hurt you too. (Police are likely to take your safety more seriously than the safety of your chickens.)
If the dogs run off and come back later, you may be able to use the chicken pen as a trap for the dogs (with the chickens either moved somewhere else, or if they have all been killed.) Then you could call the police, or turn the dogs over to animal control, or contact the owners, or something like that. Trapping the dogs will mean there is no question of WHICH dogs are involved.
If the dogs just got out once, the owner might fix their own fence and keep them contained in future. If the dogs run loose regularly, then it may be necessary to permanently remove the dogs (rehome via animal control, or euthanizing/killing them.) Check the laws where you live before doing anything permanent, of course-- laws vary from place to place, but generally do not permit dogs to run loose killing animals and possibly endangering people.