I think sausages are quite high in saturated fats. I have bought the Butterball turkey sausage, but they have added sugar, so I'm afraid Dr. Agastan would say no to sausage.
They sometimes contain flour, milk powder and other additives so are to be avoided.
I do have a recipe for making your own sausage patties which would be allowed. PM me if you want it.
What about summer sausage? 0 carbs 0 sugar I love to eat that with cheese. I have a hard time eatin cheese without somethin to go with it. I got the laughin cow. Not to crazy about it but thought it might taste ok squashed between two pieces of summer sausage.