first off, he's a good looking dog. 2nd, i would say besides the GSD he may have some collie in him (guessing from the white chest). And as far as the rawhide goes, really all you need to watch out for is his water intake. My dogs LOVE rawhide and will chew on them all day if we'd let them. If they drink a lot of water after chewing a large portion of rawhide, the rawhide in their stomach swells and can cause a blockage. Drinking a little water is fine but gulping it down isnt.
Shasta GSD 5/5/10 CGC, ITD, TC
"Dax" Thor z vom Weberhaus BCAT CAX2 CGCA ETD HCT NCO-1 PKD-T RATI RATN RA TC TKA 3/18/2013
"Hades" Guilty vom Blutfeuer 10/26/2018
Zena GSD 6/1/03-2/16/2016
Riley GSD/BC 1/10/05-2/1/2013