I can't remember exactly what the age is but I'm sure I read they should have constant access to pellets up to 12 months old. 3 of my 4 are over and 1 is under, they have 3 food bowls between them and I always make sure at least one of them is half full (when they were on museli they were selective eating too tut tut). I'm trying to limit it a bit as a couple of mine are hefty piggies but its hard with Jemima still growing