We actually suggest dropping to .1 before discontinuing insulin...we want these remissions to be strong ones, so the longer you give the pancreas support, the better.
Since you just started on the .25, I'd wait and see if she can stay in normal numbers for 7 days...if she can, she earns a reduction down to .1 for another 7 days of (hopefully) normal numbers before you'd consider an OTJ trial
Congrats! Aspen is looking great!!!