I'm using Kent 23% for asf's, but I put it in a 1/2 inch hopper inside the tubs. They eat it just fine. I can't get the 19% here either, and the Mazuri 6f is $60 for a 50# bag. I might get a bag of the Mazuri for the breeders and use the 23% for the grow ups. I'm worried about the fat content in the Kent not being high enough. I loose at least a couple babies every litter and the only thing I can think of is that the moms are running dry and need to thin out the numbers to keep up on milk. Let me know how the Kent goes for you.