I also have been feeding my girls wellness supermix 5 & their breath is horrible!
I'm switching them to Solid Gold Bision small kibble to see if it gets better I also bought the Wellness for Small dogs to try. I took them to the vet & their teeth & gums are in great conditions so its definitely the food. Has anyone tried the Solid Gold? My older yorkie has allergies so I've been told by the vet to keep her on grain-free food. So I'm a bit limited.