You can feed upto 500g a day if needed. You need about 200g a day to get all the benefits. But introduce it with a smaller amount as mine didn't like the taste at first and needed to get used to it.
My 16.2 tb has two mugs full a day, fantastic stuff for gaining and maintaining weight. He's never looked better. I just built it up over a week. Oddly I find it only works for him in conjunction with a low sugar diet. He just has that and kwikbeat and looks sooo much better than he did on any conditioning or weight gain mix.