Hi! My 11 year old cat has just been diagnosed with diabetes. The vet has prescribed 0.02mls prozinc. Does anyone know how many units this is? I’ve ordered some 40iu syringes, but the prescription is in mls, not units, so I don’t know how much to give her?! Also and dietary advice would be greatly appreciated- we are on a strict budget and can not afford the expensive diabetic food. Thanks!