Has anybody tried this product? http://www.petag.com/features_details.asp?ItemID=1664 I just saw an advertisement for it, and am wondering if I should recommend it to a friend whose 25-year-old cat is getting scrawnier by the day (no diabetes, hyperthyroid, renal problems - he's just plain old) and doesn't have the greatest appetite any more. It seems to be quite new on the market.