Why did the doctors not want Charlie to see Alger on after the surgery?

The doctors were concerned about Charlie seeing Algernon after the surgery because they feared it might negatively impact his emotional well-being. They believed that witnessing Algernon's decline could serve as a troubling reminder of the potential consequences of Charlie's own experimental procedure. Additionally, they wanted to protect Charlie from the psychological distress of seeing his companion deteriorate. Overall, their intention was to maintain a positive environment for Charlie's recovery.