hard boil you an egg and get the yolk out and, with only the yolk ma**** up as fine as you can, you can use a spoon and keep mashing it untill it like a putty "ish". then u can take a lil pinch and feed to your fry. you can keep the pressed egg yolk in a sandwich baggie in the fridge and it will last for awhile. nice trick that was taught to me from a very good breeder