The shelter didn't know anything about Max. The brother and sister were found wandering around town so it is just a guess on their part. Thanks for the link to the temperament test. Will try it on the puppy we got today.
Thanks to everyone for their help on this. It really helped me with my decision.
Those herding breeds can be a handful! Keep him busy and have fun with him. If you need any training help, get in touch. LOL, I'm right there with you, here's a pic of my new pup