Our vet clued us in to that a long time ago.I love it that Iams and pukenuba and other gourmet brands are made by the same company as the el cheapo stuff is. Yep you get what you pay for
Something to do with the wheat glutin...I give my cats Purina Cat chow and an an occasional can of friskies when it is cold outside.
Any word yet on what is actually wrong with the bad food ?