Hello!
Not really my area of interest nor theme. Summarische Losses database of the Aviation History Norway site shows for I/SG77 8 planes and for II/SG77 1 plane destroyed by enemy a/c gunfire at July 25th, 1944. No mention of types. SG2 had no losses to enemy fighters that day.
Michael Holm's Lw site has 8 "Durch Feindeinwirkung" Ju 87D-5 losses for I/SG77 in July 1944:
http://www.ww2.dk/oob/bestand/schlacht/bisg77.html I think these are the "27" Stukas. II/SG77 had only Fw 190s then.
Cheers,
Kari