Hello! New poster here just getting started in raising chickens on a larger scale and we've found it will be cheaper to mix our own feed, but I'm having a hard time finding Fertrell's Nutri-Balancer. Is there a supplier on the net? And for those that use it, how large a quantity does it come in and how much does it cost? Is there any other supplement I can use that may be better or more cost effective? Thank you!