My friend has been cat sitting her brothers 2 cats recently and has noticed that one has really greasy fur, actually stuck together on her tummy. She bathed the cat in case that was the problem but it was greasy again a couple of days later. Apparently they are not bathed to frequently, are fed on Whiskas moist food and the other cat doesnt experience this problem. Any ideas folks? No other information available tho as her bro dropped the cats off when she was out and she has only just been able to contact him to find out their names!!