This is great replacement for mum cat's milk if something happened, but I have found it very handy for sick cats or ageing cats. They suggest a bottle, but I have found this method iffy at best. I suggest use a hypodermic syringe (minus needle of course!). Mix up the formula and the used the syringe to dispence this. Advise wrapping kitty in a towel securely so that don't have wiggle room. Put the syringe at the side of their mouth and gentle feed it to them. When a cat goes off food, it's vital to get him eating as soon as possible. With colds etc., they will stop eating because they cannot smell. This often leads to decline and then not having enough strength to battle the illness. Without older cats, I treat this as Ensure for the older ones. Just give them some on a saucer. It helps keep them weight up
I keep the powder on hand and at first sign of illness or for the old times, I have the perfect way to keep them strong and healthy.