Add more ports by: Upgrading your Mac's graphics card. Apple has phased out this proprietary display plug, but you might see it on an older monitor or Mac. Look for the rounded shape of the rectangular connector to help in identification. The cable carries power, USB, and video. You can adapt a DVI signal for an ADC monitor, but the converter boxes can be pricey; an ADC signal from a Mac is more easily converted to DVI for a standard display.
Most nutrition articles about feeding horses recommend approximately two (2) percent of their body weight in forage per day. This would mean a 1,000-pound horse would need about 20 pounds a day. This amount is not carved in stone.
Many horses that are picky will eat with gusto if some moist beet pulp is added to their grain. Do not feed more than one-half percent of the body weight in grain at one feeding. So a horse that weighs 1,000 pounds should not get more than 5 pounds at a time. (1,000 pounds times 0.005 equals 5 pounds). A horse that weighs 800 pounds would not get more than 4 pounds (800 times 0.005).