We did a lot of research and talked to many dual dog households and the unanimous advice we received is that two dogs is better than one. More expensive, more work, but they keep each other company and (hopefully) become best friends. We heard is is especially important to get a second dog around the same age and energy level so they can play.
So far, so good! Mylie LOVES her brother. Here's a video of their first meeting. We stopped at a park a few minutes from the dog breeder so we could introduce them in a neutral place. The video speaks for itself. Mylie loves to kiss Watson and wrestle with him.
The first night, we made Watson sleep in his crate, but we put it in our bedroom so he could be up there with Michael, Mylie, and me. Watson went into his crate, and Mylie followed him and snuggled with him and gave him kisses until he fell asleep. Then she sat all night at the foot of the bed so she could watch over him. We woke Watson up three times to let him outside, and Mylie followed and tucked Watson into his crate each time. He slept all night and we woke him up at 5am to feed him, and after we fed him and put him back in his crate he started crying. Mylie jumped out of bed and snuggled next to his crate to comfort him.
She's such a wonderful big sister!! This afternoon they played in the yard and Mylie shared her stick with Watson.