My gang (of 4) used to eat only Purina Cat Chow, then I changed them to Purina Senior Cat formula. Then back in April, one of them (Danny) was diagnosed with a tumor that's probably cancer. The vet found it in a regular physical, so he didn't have any symptoms. Anyway, the vet suggested holistic treatment with supplements and anti-oxidants and what-not. And I changed the whole gang to something called PHD Feline formula. I order it over the internet from their website which is http://www.phdproducts.com .

I don't know how well it's working for him, but Danny is still a happy, comfortable cat. All four of them have slimmed down considerably on this, and since they are all either 13 or 14 years old, it's probably good for them. Not an sales pitch, but just fyi.