Phytase was recently approved for use in the United States by the Food and Drug Administration. But phytase is economical in the Netherlands because animal growers face financial penalties if they exceed certain limits on phosphorus production. Some doubt whether phytase can be economically used here unless ways are found to manufacture it at lower costs. It would have to be nationwide. Still, that is only half the picture.
Most farmers grow a portion of the feed for their animals.
So it is important that the manure produced when animals are fed a different diet contain the mix of nutrients needed to grow crops appropriate to feed back to the animals while minimizing runoff potential. It's an integrated approach. If feed changes become commonplace, they could affect other portions of the agricultural industry. It may increase demand for consultants to better analyze an animals' diet, but it could reduce demand for some of the traditional grain feeds being sold. It's not going to fit five farms.