I have no idea about cat dosage of olive oil, however my vet recommended flax oil for Mitzi's fur (dry, dandruff). Just a human-sized capsule squeezed over the food on a daily basis. I haven't done this as the food I give her (Pet Gold Light Hairball) has the proper cat-sized dose of flax oil in it. It's taken a couple of months of being on this food, but now her fur is GORGEOUS! Plush, thick, shiny and soft - my little fur ball/purr-ball. I love my itsy bitsy Mitzi meatball!