I've tried all sorts of different meat combos and seasonings for breakfast sausage, but nothing has that pig sausage taste, except PIG. As an old southern hillbilly, I was raised on pork sausage and nothing else gets the job done...Sorry. I must agree with Lloyd, just grind up a pork butt, fat side and all, season with your favorite seasoning and you are good to go. The local grocery puts butts on sale on occasion for $0.79/lb. Including seasoning, I'm well under a dollar per pound. No way to beat that, that I've found. My favorite seasoning is A.C. Legg's Southern Sausage Seasoning. Add a touch of my home grown, fresh ground sage and VOILA!
I put venison in almost everything and eat it a lot, I'm mean a LOT, but not fer my breakfast. It does make excellent summer sausage when smoked, but that's a whole nouther story.
Good Eating, Walt