I'm looking to adopt a dog. I adore giant breeds but would like to adopt from a shelter. I came across the most handsome Leonberger mix and plan to meet him soon. He is 8 months old and I know nothing avout his history at all. Does anyone have experience with Leonberger MIXES? Once mixed, do they no longer have many of the same traits as a purebred? Anything I should look for when visiting him? I have 2 young kids and 2 cats at home as well. Any advice on what to look for (good or bad) in a rescue dog is appreciated! Thank you!