Do what ! I, like a few others here are just adding comments that there are cheaper alternatives to feeding your pet, even healthier. 8.50lvs a kilo, thats more than pork, beef, chicken and even fish. Cats are obligate carnivores (meaning they MUST eat a raw meat based diet to be healthy).
As a registered charity then SURELY you must be tight for money and looking at all ways at saving a penny. Raw meat is better for the animals and much much cheaper than 8.50lvs a kilo. I don't understand your philosophy of feeding animals this type of food at this price ?