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.
I encourage owners to budget (to feed) at least 1.5% of each horse's body weight per day in hay--less if using hay feeders that reduce waste; more if hay is thrown on the ground, says Julie Wilson, DVM, Dipl. ACVIM, of Turner Wilson Equine Consulting LLC, in Stillwater, Minn.