Are there any ingredients you do not feed your dogs?

I’ve noticed that sweet potato is currently a fairly commonly used ingredient in processed dog foods.

Unfortunately, this is an ingredient I cannot feed to a sweet potato intolerant dog. Potato is okay, yet not sweet potato…

And this adds up to steering clear of complete brands, no matter the variety within the brand, so as to avoid that 1 ingredient. ???

It would be interesting to hear if there are any ingredients or foods that others may not feed, perhaps for similar reasons? perhaps through choice?