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.
Changing from grass hay to alfalfa all at once can change the environment in the rumen of cattle, sheep and goats and in the cecum of a horse (because of the shift in pHâthe acid/base balance). This can disrupt the microbes that help the animals digest their feed. Hay for Horses. Horses can do well on grass or alfalfa (or other legume) hay.