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.
The average 1000 pound horse must eat approximately 10 to 20 pounds of hay every day according to LSU. The weight of a bale of hay will vary depending on the quality of hay and the settings on the baling machine that is being used to bale the hay. The average square hay bale weighs approximately 50 pounds. To provide your horse with the necessary amount of hay you will need to give him a quarter to a half of a bale every day.