I tried this with my elderly Maine Coon female when she wasn't eating enough. She loves it. She doesn't have very much at a time, but she then eats her normal food so it seems to stimulate her appetite. She now expects this every evening and tells me when it is late! I have found the last couple of batches to be a little thicker than the first ones I bought, so I do have to thin it down with a small drop of milk. This amount is not enough to upset her tummy.
My 9 month old ragdoll loves this but the daily allowance is 1/10 of a pouch, I emailed Gimpet to ask how long it stays fresh for and it's 3-7 days before it turns, so unless you have more than one cat, you will be wasting some of this :(
Great carton though, easy to store and keep fresh.
Bought one of there for my cats just to see if they like it - and they absolutely loved it and ask for more! Will be coming back to order. The product design is good - it stores well as it can stand upright and screw top is convenient to use to keep it fresh.