In which case I would suggest something along the lines of:

Create a Concatenation of Donor & Feedback Date, say

F2: =A2&":"&C2
copy down for all rows

You can now in theory run a COUNTIF test

D2: =IF(COUNTIF($F$1:$F1,">="&$A2&":"&($B2-10))-COUNTIF($F$1:$F1,">"&$A2&":"&$B2-1),"Yes","No")
copy down as required

It's not great, it will be slow-ish to calculate but it should work (based on your samples)