18 April ?Is it a bounce?

Dear friends, I have a question:
Rocky dropped too much recently from blue to green number (too low) in AM cycle so his PSPM is higher than I expected (still blue) - today and a few days before had hypo and gave me some yellow numbers later.
Does it mean he had bounced from too low BG? Or is his BG higher because I gave him more food to treat that low BG?
I have decided to reduce the dose as he seems more sensitive to insulin at the moment.
He has been to the vet's for bloods and it seems that his kidney function and CBC is good, thank God.
I would appreciate any input.
Marlena