Definitely take it to the vet. The cigarettes could kill the dog.
You should pick up the other dog poo so the other dog can stop eating it
Keep the diapers in a location that the dog can't get at.
tell it to stop it and wack it
Feed it.
The show Dog Whisperer had an episode about a dog who had an obsession with eating rocks. That will give you an idea of what to do.
kill it.
Go to pet store or tractor supply.They have pills out to stop your pet from doing this.
There are several reasons why a dog may stop eating, including illness, dental problems, stress, changes in routine, or food aversion. It is important to consult a veterinarian if a dog stops eating to determine the underlying cause and provide appropriate treatment.
try too pull
Dogs Like/sniff other dog butts to get information about the dog. It is a form of communitcating.
Get the dog some good chew toys. Dogs need to chew.
Let him eat large animals.