All great suggestions so far.
Question - Why exactly do they not like the ground venison? Is it the taste, or just a weird rationale in their heads? Do you butcher the deer yourself? If so, how well are you trimming the trimmings?
If it’s a “gamey” taste that they dislike, I would assume you aren’t getting enough fat or silver skin taken off the trimmings. It’s tedious, but it makes all the difference, especially for picky eaters.
One additional suggestion… Get an Italian sausage seasoning kit. Mix with about 20% pork trimmings. This is great for making spaghetti, lasagna, goulash, pizza topping, etc. The Italian blend and the pork trimmings mask wild flavor very well.
I do my own butchering and am very picky about the look of what goes into the grind. For my family its slightly about the flavor but mainly about the smell when you brown it. I can be browning lamb, beef or pork or even the bear from last year but as soon as I break out some ground venison my family asks what stinks?
I'm also very fortunate that with the beef farm we have ready access to ground beef. Maybe I need to start blending it more than just using ground beef in many of the dishes above.
I also ordered a bunch of different bratwurst flavorings to try this year. If I can find a flavor my family likes they'll eat the crap out of them.