The experiments were conducted at Panelis, Diana Pet Food Division expert panels in palatability measurement. This center specialized in the evaluation of food palatability for dogs and cats is modelled on the real-life home environment and is committed to the well-being of pets and to the expertise in palatability measurement and to the observation of the feeding behaviour of dogs and cats. Cats were recruited between two months and three months of age from breeders and private owners. Kittens were always adopted by two, a male and a female from the same litter