Aren't men supposed to mellow with age? In an impromptu moment of "cattiness" Bob Dylan extended his elderly talons over Rod Stewart's latest attempts at jazz music. Branding Stewart's "American Songbook" album series as "disappointing," the Like a Rolling Stone singer jibed at the integrity of Stewart's new songs. "I'm not going to knock anybody's right to make a living," Dylan told AARP magazine, which is aimed at readers over the age of 50 in the USA. "But you can always tell if somebody's heart and soul is into something, and I didn't think Rod was into it in that way." The digs from the American folk legend, 71, about the British Rock star, 70, were reported with shock in the US media. "Ouch, Bob!" wrote the New York Daily News, who described the meanness on their entertainment pages as: "The most unlikely moment of bitchiness we can remember." CREDIT: John Shearer/Splash Pictured: Bob Dylan on the cover of the latest issue of AARP magazine in the USA. CREDIT John Shearer/Splash Splash News and Picture Agency does not claim any Copyright or License in the attached material. Any downloading fees charged by Splash are for Splash's services only, and do not, nor are they intended to, convey to the user any Copyright or License in the material. By publishing this material , the user expressly agrees to indemnify and to hold Splash harmless from any claims, demands, or causes of action arising out of or connected in any way with user's publication of the material.