Considering the seed pod size and count plus the aggressive growth behavior, lots of luck controlling it on a limited budget and close neighbors. My experience with cows is that they will eat it pretty good in the June time frame but that's about it. Hay, forget it. Makes for a good cover crop to stop erosion.
While on the Millet subject, I tried Pearl for a hay crop once and didn't produce. My current options are Bermuda in one perennial patch and either Jumbo Rye or sorghum-sudan in the annual patch. Johnson grass is taking over the annual and I'm going to let it. As prolific as it is and how well cows take to it, it's a winner. Shoot some food to it and cut it in the boot; yum, yum. Obviously some folks classify it as a weed.....an undesirable plant in a managed plot......to that I say: One man's junk is another's gold!