For those that use it, do you feel that it works better 30,60,90 or 120 days out from you target show or is it more effective to feed it throughhout the entire feeding period - start to fiinish ???? I was given a bag of it to try as a fat additive and I didn't know the best way to gain the most benefit from it. Our target show is late July to early August. Do you topdress or mix it?