Is it possible for 1 litter to have more than one sire? The bitch is a GSD "purebred" (this is AK after all) the sires could be a Great Dan, and Aussie Shepherd, or a Rottie. I only saw my neighbors pup so I cant say for the whole litter. Is it possible for more than 1 sire for a litter? This is for my own curriosity only.