Six-toed, highly active, and taking supplements....

Dear George, 
I’m following (silently) your blog for a while. I must say I enjoy it very much. At times I found it quite amusing and at times I found it quite informative.
Lately I’ve seen that one of the reoccurring theme was food – what should cats eat.
I’ve learned that Gizmo is eating his broccoli, Chico has his food homemade, Jasper is eating a raw diet from the pet food store and the list goes on and on! But, I have one question: do we need to take supplements and/or vitamins?
I’m a very, very active polydactyl baby (see the picture attached) – I have lots of energy and I can run and play all day (of course having 6 toes helps), but I wonder if it’s the supplements my mummy gives me (she’s in the business - http://www.powerbod.com/2/arlenemetke/) or am I naturally active?
Honestly, what’s your take on this?
Yours in health
Baraboo 

Dear Baraboo,
My preferred diet would be mice, other small rodents, the odd bird and the occasional insect , a completely natural diet. But I don't lead a completely natural life as I live in a human home. Instead I get given very good quality complete cat food. No human food, except what I steal off the kitchen floor, the occasional bit off a plate that hasn't yet been put into the dishwasher, and the odd mouse. A little of what I fancy does me good.
I seem to be completely healthy. So I would say that if you are given a good quality complete diet (and there are now raw food diets available in envelopes here in the UK with no risk of salmonella), you shouldn't need anything else. Would a supplement be a good idea? Only if your human knows what she is doing. 
Humans sometimes think what is good for them is good for us. Wrong. Human medicines, like aspirin, can kill us. There are foods like onions, grapes and raisins, and chocolate, which are good for humans: bad for dogs and for cats. There's a list here.
So tell your human always to check with a vet before giving us human food, human supplements or medicines or veterinary supplements. Stay safe.
Yours 
George.

Are sprouting beans good for cats? I am not a rabbit.

Dear George,
I seriously wonder if my mummy knows the difference between a cat and a cow (yes, I know…both start with a “C”) or rather said between an herbivore and a carnivore!
I am saying this because for the last three weeks she is trying really hard to grow something for me, something that she calls “sprouts” (photo attached). I mean take a look at the photo and tell me how on earth does she think I’m going to it that ugly, unappealing stuff? She’s telling me that it’s winter and I don’t have any grass to chew on if I’d like to. But, for God’s sake then just grow some grass for me.
George, can you post a list of “greens” good for cats? PLEASE!

Yours truly and always,
CAT Victoria

Long digestive tract with huge caecum

Dear Cat Victoria,
I can't post a list of greens that are good for cats. But there is a list of human food which is poisonous to cats here. Grapes, raisins and onions (even in gravy) are on this list. The more you eat of these dangerous foods, the more poisonous they are. 
A little vegetable is probably good for cats, but not too much. We humans, and dogs,  are omnivores, and are designed to eat both meat and also vegetables. Cats are not.
Cats are "obligate" carnivores, meaning that their intestines are designed for meat - the whole carcase, skin and bones, not just flesh. You can see this in the illustrations here which show a a rabbit's intestines (an animal that is designed to eat nothing but vegetation) above with a cat's digestive system below. The rabbit (above) has a long intestine with a huge wavy pouch called a caecum which breaks down the cellulose in vegetables, while the cat has a short intestine with a small caecum which you cannot even see in this illustration. 
Here in the UK, you can buy special grass for cats. I think you would enjoy that better than sprouting beans. I know I would.
Yours
George