I have two JR purebreds. They are two totally different dogs! My oldest one is a mess, agressive at times but sweet to me, chews stuff, jumping everwhere and she is 2 years old.
My 6 month old has the sweetest disposition, is ALWAYS happy to see you whether you are getting home after being gone all day or just coming out of the bathroom! He wags his little nubby tail and his whole back end shakes! Its amazing to me how they are the same breed yet so different.
Do you know what else your little one is mixed with? Enjoy! They are loads of fun!