Wiktionary
feed up
vb. (context transitive English) To feed (a person or animal) until they are at a healthy weight.
Usage examples of "feed up".
He'd tried shunting the feed up to the control room but he kept running into blocks.
She snapped back the slide and watched a shiny brass cartridge feed up into the chamber.
Beijing beams the feed up to the satellite that bounces it back in a wide enough spread that you can pick it up anywhere on Earth.
Sometimes they would feed up to within a few feet of him, and the mare was always around, begging for sugar.