Not sure what everyone else does.
But I never limit their food, when they are so young I just let them eat as much as they want. Dry out all the time and then canned two to three times a day. Really cant tell you how much canned I use, I just put it out.if they eat it all, I put out more until they stop. They have always stopped eventually.........
As they mature, canned is fazed out slowly except for the occasionally treat food.