Neighbours dogs

Bloody neighbours dogs have taken to barking for hours, consistently during the night. No sleep now for 2 nights, got the dogs barking, mine doing occassional backing vocals and Rich huffing and puffing, on the verge of exploding! Why have 2 guard dogs and then not investigate actually why they are barking for 3 hours??? When he did go out to them they shut up straight away.How the hell do they sleep through it for that long???? Oh I know the answer to that - weed!!!!! Grrrrrrrr.