Welcome...we would love to see pictures of Dexter..as you can see, we just love pictures here
Dexter sounds perfect and a faithful little companion. I would say he just loves being with his family...they are dogs that need to be interactive with the ones they love. He loves you to pieces

What a wonderful active life he has with you and I'm sure he loves every minute of it.
Enjoy your baby and I can't see it matters where his papers are from...unless you were going to breed him...but I hope you neuter your boy and love him for the wonderful pet his is. Wishing many many happy years together!
Oh, I'm not sure about the howling but I'm sure others will respond they maybe know.