I don't. I basically feed roughly once a week, but I do not adhere strictly to any set thing like "every Friday" etc. My bigger snakes eat less often, about once every ten days or so.. my smaller "growers" get fed roughly once a week, but let's say my rats are not up to size, I will give them a few days to grow a bit bigger (yes, ratlings can grow a lot in a few days!) Especially with 4 of my snakes actively breeding, a set schedule does not work, but they are all fat and happy (not overfed though..) So how about you?