Caninsulin can be used in both dogs and cats. Caninsulin is an intermediate acting insulin product containing porcine insulin, which is structurally identical to canine insulin. It is use in cases of diabetes mellitus (insulin deficiency) in dogs and cats, where the required blood levels are achieved by using an individually adjusted dose of the product. A vet prescription is required for the medicine you have chosen. If you do not yet have a prescription then you can print out the following blank veterinary Prescription Form which you can ask your vet to fill in when you next visit. Please note that changes to legislation in 2005 means that Vets must offer you a prescription to take away and not just supply you the medicines directly. This is to ensure more competition and lower prices for you.