I am currently feeding my two Nature's Variety bison and the beef medallions and also Primal lamb, turkey and sardine and duck. They are doing really well on both. I just started feeding them both brands about 2 months ago and have not had any problems. I also feed them chicken wing parts twice a week. I like Stella and Chewy's and fed them that for a while but it seems to constipate them. I think I will stick with the Nature's Variety and Primal for now. Hope this helps!