Welcome to Yorkietalk. I see you are from Denver, Colorado - one of my very favorite places!!!! We lived in Parker (just south of Denver for several years and lived in an apartment at 910 Downing Street while our home in Parker was being built). My two sons were born at Rose Medical Center. I LOVE DENVER!!!!
About your baby and his "soft spot" - it is called an open fontalle. Generally they go away but not always. You need to protect his little head from injuries - a bump to that area can cause fatal injuries. My little Emmitt has an open fontalle which hasn't quite closed yet - he is 6 months old. Be sure that your vet is aware.