I just lost 2 girls less than a week ago same way. Our entire property is fenced. They dug in at the gate. Animal control is who you want to call if you can find out whose dogs did it. I know whose dogs got mine. I am heartbroken and angry. The sheriff went and told them what happened and that's its against the law in TX to let your pets wander about off your property. I didn't press charges ( I should have - no apology, no offer to attempt to replace my hens. They can't be replaced but the offer should have been there). I hope the dogs never come back and you don't have to worry about it but keep an eye out for if they do.