It helps not to get too theoretical when it comes to morality. Someone that eats turkey and not vegetables out of moral conviction? That's not a sane thing to worry about and compensate for. There is a 0% chance of that being the case. If you worried about preferences that obscure/made-up you'd forbid every category of food, every color of food, every texture of food...

On top of that, it's very likely that every ingredient in the "turkey loaf" was something that would not be out of place in an actual turkey loaf. In other words, no ingredients being secretly added, just one being removed.