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Do you know the owner? If so, of course go talk to them and let them know that they are trespassing on your property. He/she needs to confine them for their own safety as well as your livestock's.
If you don't know the owner, and you see them again on your property- or out on public land, and if they seem touchable- catch them and bring them to the local AC (for their safety and yours). If they are not nice dogs, don't risk trying to catch them- leave that to AC officers.
In the meantime, try to improve the safety of your coop- check for holes, and places something can dig in. If a dog can dig in, so can raccoons.
I can't tell how old you are, but something about your post makes me wonder if you are younger- being at friend's house with rest of family- if you are teen or younger, get your parents involved if you are going to be talking to neighbors or trying to capture dogs! If you are an adult- sorry!