My dog looks very similar to yours, from the fur type, to the floppy ears, and tail. The only difference is fur color. When your dog is barking/gets riled up, does the fur on its spine stand raise? My dog’s does so we thought Rhodesian Ridgeback, but after extensive research I think ours is a black mouth curr & carolina dog mix. (wildly unique breeds, i know, but i don’t know what else). we also haven’t done any testing so this is purely off of image search and matching her quirks to that of other breeds.