We have a 13 lbs dog who cannot eat fatty dog foods. As a result we make our own. Daily diet: 1/2 cup of skinless chicken boiled 2/3 cup of overcooked rice (1 chicken bouillon cube) 1/2 cup of plain pumpkin 1 egg white 1/2 a vitamin from vetriscience I’m not sure 7 IU of Vit E and 500 IU of Vit A are enough. Should I give him the entire chewy tablet? Does anyone have a reliable gauge for how much supplement a dog his size needs?