Is there a way to improve halitosis in my dog?

Let him chomp on anything with charcoal or chlorophyll.

Do NOT give him Greenies. They have been known to cause intestinal distress and even death.

Does my dogs flatulence contribute to my halitosis?

Ive been letting my dog sleep in the same bed as me for about a year now, and it farts while it sleeps. In this year ive woken up and my breath has been getting worse and worse. is it possible that this is the dogs fault? i brush my teeth every night.

Doubtful.