I change up treats all the time but Bil jac frozen is Karlo's favorite most often. Feeding raw makes it more of a challenge to find things the dogs like, so I go with natural balance rolls, string or cubed cheese or grill chicken breast with some garlic.
Unfortunately we can't buy Bil jac in MI, unless it is from the warehouse and purchased by the case. It isn't the best, nutrition-wise but makes for great tracking bait and training rewards. One batch I got had green tripe as the first ingredient. I was impressed with that.