You have to buy in bulk from the manufacturer to get the bigger bags at this time , i save about 85 dollars on 40 pounds verses buying the 1.75 pound bags at 5.99 Not sure how many bags you have to purchase to get a better price on you can call and ask what the minimum order is, i know someone that ordered 5 40 pound bags, the shipping was like 20 per bag but the feed kibble was cheaper than you could get a 15 pound bag from anywhere with shipping . shipping on 1600 pounds ran me 525 dollars but i can go to the dock and pick it up and save 130 dollarsI am not able to find the 40lb bags of Ultakibble near me, but I get the 15lb bags from Drs. Foster and Smith online. You can buy the 28oz bag or the 15lb bag. They frequently have 20% off sales, and it is always free shipping over purchases of $45.00.