Three salt plants were laboratorial studied concerning the effect of wetting and sterilization on their chemical and structural compositions. The effect of biological treatment (with white fruit fungi) at incubation periods (1 —- Sweeks) on their chemical and structural compositions was studied too. On the light of these in vitro results, 6 feed mixtures were formulated from the treated plants (Acacia safr'gna and Tamara mannr‘fera) with either fungi Pleurotus oslreatus and P. florida or without biological treatment, besides berseem hay as a control. The roughages were offered ad lib. besides 125 g barley grainsldaylhead of Barki rams in palatabillty trials. Thereafter and from the results of the latest trials (palatability), 3 mixtures were evaluated in metabolism trials followed by rumen liquor and haematological studies. It is to conclude that the physical and biological treatments are useful in improving either chemical and constructural compositions of salt plants The fungal treatment improved animal feed intake from these plants as a consequence of the improvement in their digestibilities and utilization without harm affecting animal's health and performance Hence, it is to recommend offering some of salt plants, which are biologically treated for animals in deserts and shores without danger.