Turn them in is about all you can do also if there is no shelter, no Rabies shot or tags then all are considered a type of crime. Complaints can be Anonymous usually just in case somebody wants to try to sue you for complaining about them. The only thing that can fight and Court is if they get through animal taken away because of lack of shelter because they won't take an animal way just for not having your tags are rabies on the rabies if they bite another animal or person yes they can they have to put them in quarantine until they know if they do or do not have rabies then you can be in trouble criminally.
Maybe you can help. Tell the neighbor that you can walk him once in a while (if you can). Try to get the neighborhood children involved. They sometimes love to play ball or keep away. If you want to help that dog, get involved
The only thing they COULD be doing wrong legally if its not licensed or rabies vaccinated. Otherwise keeping a dog in the yard is not illegal and nothing can be done from a law enforcement stand point to force them to keep it inside. You can make a complaint that the animal is a noise issue but you will have to sign the complaint and they will know it was you making that complaint and can take you to court to fight it.
Or maybe you can mind your own business lol. No life? You have no life at all?
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