I’m super late by years- but I just want to say I have a mix. She’s a beautiful service dog. The parents are important. All mixed dogs even if designer are subject to their parents temperament. Because it’s not being bread between these to follow a color or temperament it can change dramatically based on the dogs history.
I got very very lucky. I have a calm dog at 9 months old who likes to play and is self trained. She’s head strong at times, but she’s a beautiful baby.