RF-1 question

I know there are several threads about this product, but I just need a couple questions answered by the folks that use it personally. First question is, if I buy the 5 pound bag, how much of it would I use on a 38 conditioned weight dog in 8 weeks? I have heard Stillwater say that a 10 pound bag will last for 3 keeps, but he didn't mention how big the dogs were. I would also like to know how much per day the dog would get, and do you use it on rest days too?
Any help appreciated, J

 

Buddy the directions are on the bag. And it depends on your dogs diet already on how much you should give. its a supplement not a meal. But I will say I use it and I like it. But it's not cheap!

 

Yeah $59 bucks for 5 pounds is pricey, but if I don't have to use any other supplements I think it's a win win. Would a 5 pound bag last for 8 weeks on a 38 pound dog? Take in mind he will be closer to 40 for the majority of the time.