Guesses on the little lady?

I ordered an Embark for my lass who was purchased a gift from a puppy mill. Owner said she's a purebred Australian Shepherd, but for "legal reasons" he sells everything as a mix. Owner also says was born without her tail.

I'm personally thinking Mini American Shepherd, Pit Bull or some other type of terrier, Collie Supermutt, Husky, Golden Retriever. Considering she's from a puppy mill I highly doubt she's purebred and even more doubtful she'll have less than 3 breeds.

She's extremely active (her record walk time is 6 hours, and she still wanted to keep going!), vocal (loves to talk back LOL), with both herding and prey drive (She likes to herd people to do what she wants, and has shown interest in herding horses, but will chase strange cats and is not dog friendly, especially to small dogs) Pretty smart but has the stubbornness of a brick (taught herself how to open doors. Will throw temper tantrum if you tell her something she doesnt want to hear). World's best guard dog, will scream and charge at any 'intruders'. Loves to swim even in the dead of winter and has webbed paws, hence my theory on retriever since they're more than usual 'webs' on dogs. Small paws.

Place your bets below while we wait on results!