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.
Entire textbooks are written on this topic, but the basics are: 1  Hay and other roughages provide nutrients and satiety for your horse.  On average, a horse must consume about two percent of dry matter of its bodyweight per day (A 1000 lb horse will need to consume 20 lbs of feed on a dry matter basis).