Hi folks, our big boy just turned 9 years old. About 1.5 years ago we started monitoring his blood work. In 2017, his ALT liver enzyme was above normal range at 382 (we were told regular range is 18-121). He seemed healthy and happy, so we decided not to do anything about it. One year later in 2018, his ALT liver enzyme was up to 403. So we started him on the liver medication hepatosyl. Since then (July 2018) his ALT has been fluctuating between 300-350. Has anyone had similar experiences or know much about the ALT liver enzyme and hepatosyl? Since the med hasn't improved his liver enzyme level much, we're thinking of taking him back off the med. We just don't know if it's likely that this high ALT level might just be normal for him? Or if we should be more concerned that there is some underlying liver issue? Thanks!