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.
According to Fernanda Camargo, DVM, PhD, assistant professor of Animal Sciences at the University of Kentucky, pre-mixed pellets/grain feeds cost $6-15 per 50-pound bag. Thus, a horse fed 3 pounds daily of concentrate feed goes through a bag every two weeks, costing $12-30 per month. Supplementing fat for added calories is another expense, which varies depending on the product used (e.g., vegetable oil or rice bran).