Oh! Tough!
Petkind/Tripet comes immediately to mind. I'm pretty sure both of their lines don't contain flax. They are known for very limited ingredients. I currently have Petkind bison tripe and duck at home and the ingredients literally are just: duck/bison tripe, water, quinoa, potato, and blueberries.
Petkind Pure Kindness
Would take some looking at ingredient lists to make sure but for some reason Earthborn holistic comes to mind as well... hopefully others will be able to give more foods to look at!
Petkind/Tripet comes immediately to mind. I'm pretty sure both of their lines don't contain flax. They are known for very limited ingredients. I currently have Petkind bison tripe and duck at home and the ingredients literally are just: duck/bison tripe, water, quinoa, potato, and blueberries.
Petkind Pure Kindness
Would take some looking at ingredient lists to make sure but for some reason Earthborn holistic comes to mind as well... hopefully others will be able to give more foods to look at!