Here’s what I see. When Walter hit yellow you stopped testing for several hours. You missed any opportunity to slow the downward slide by not continuing to test. I would test and feed hourly at that point and feed him a little each time to slow him down. By the time you tested again he was already at 71. Too late to intervene with food. Then he bounces to the moon. Your goal until he gets used to blue should be to NOT hit green nadirs. You want to prevent a decrease or greens until he gets used to blues. Shiloh snd Gideon is trying that and the bounces are clearing more quickly.