A while back, I found our cat would paw it's food from it's plastic bowl and eat off our kitchen floor. I spoke to our vet and he suggested I swap from a polypropeline plastic bowl to a scratch resistant melamine bowl.Apparently, non scratch resistant plastic bowls retain old food smells and promote bacterial growth.This could be why our cat went off it's food. Since changing to melamine, everything has been OK. I found a perfect melamine bowl on the internet; the non slip SnuggleSafe bowl, which even comes with a spillage tray. All my cat eating problems solved for only £1.99!