lindz so sorry to hear more chickens got killed. And all your cochins are gone?

Terrible. The dog issue is a tough one, because most folks think that shooting them will be the end of the problem, but in a way, it only punishes the dog. The owners get off without any penalties and will just continue the cycle with new replacement dogs. I'm surprised the animal control folks don't take this a little more seriously. I agree with MC that they could easily find out who owns two huskies in your area. They would certainly make the effort to track down a dog that bit a person. Maybe you need to be the squeaky wheel that gets them moving. They should help you find the owners so you can get compensated for damages (the cost to replace the type of chicken at the age you lost them plus expenses for your time- it's what small claims court is all about!). I don't think people who let their dogs run will be inclined to change their ways unless it costs them something not to.
That being said, sounds like shooting them might be necessary. I would be worried about my kids being out and having strange dogs run on the property. Fences are great, wouldn't live without them, but we've had dogs in the past that could scale a 6 ft fence with ease, and last year we had two very large pit bulls come straight through the fence into our yard. Luckily the chickens were still locked up when it happened. The neighbors tried to pretend they weren't home when I went to tell them they needed to fix the fence. Ha! Didn't work!
People who let their dogs run rank right up there with lowlifes who dump their trash along the roadway, graffiti hoodlums, and nit-wits who take soda at the fast food joint when they haven't paid for it (often with their kids watching). These types of low level, thoughtless pseudo-criminals really burn me up. I almost have more respect for thieves and housebreakers. At least they're honest about being criminals.