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.
However, that they can and do eat meat does not mean that they should. A horse may be trained to eat meat, or it may be driven to it by need. This doesnât mean that a regular diet of meat in the long-term is a good thing. Your horse may like an occasional bite of your hamburger or tuna sandwich and can eat it without harm.