high oil content and do not have as long a shelf life as some of the others. my girls have tried cod, salmon, turkey, lamb, and chicken. the chicken is their favorite, but they liked the cod too. they were not thrilled with the salmon. the only other thing i have noticed is that i have to make sure they don't gobble them too fast, or it will come right back up. but, i crush it and sprinkle the crumbs/dust on some of their canned food. and, if i have to give any medicine or supplement that is in a powdered form, i can mix it with a little of 