The study was conducted on 15 balady ewes in three groups, 5 in each group. Three different rations were given for the three groups. Rumen juice and blood serum samples were drained three times from each animal with 10 days intervis. Activities of AST and ALT enzymes in these samples
were determined. The study revealed that aspartate aminotransferase (AST) was decreased significantly in blood serum at the second and Third time of sampling in ewes fed green onions (group II) and those given green broad beans stems (group III) and in the ruminal juice of ewes fed sugar can straw (group) and those of group II. ALT showed only an increased activity in blood serum in the second time of sampling in group il and in the third time of sampling in group 1, but ruminal juice showed only an increased activity in group at the third time of sampling and in group Ill at the second time of sampling. A negative correlation between ALT activity of blood serum and that of ruminal juice at the second time of sampling in group !was only recorded. It could be concluded that the activity of transaminases in ruminal juice is not an indicative for their respective activity in blood serum.