On average, the untreated HIV infected patient will progress to AIDS in about 5-10 years. Since 1996, the introduction of powerful anti-retroviral therapies has dramatically changed the natural progression of HIV infection to the development of AIDS.
You CAN feed your horse just hay, but you have to up the portions and it also depends upon the type of hay you are feeding. Alfalfa mix is normally the best but there again, you're goinng to have to feed more hay to make up for the not feeding grain when you are riding.
Most horses will eat 2 to 2.5% of their body weight in hay per day. Average daily free-choice intakes of hay by a 600 kg (1320 lb) horse is 12 â 15 kg (26 â 33 lbs)/day or about a half of a 65-lb square bale per horse per day.