Hello and welcome
to the forums, Angie!
I can't add anything to what FaeryBee has so expertly stated
I'm sure little Quinn knows how lucky he is to live with such a caring momma and he'll perk up soon, you'll see. It's great you've decided to bring him into your life and I know you'll have lots of fun together.
We'd love to see pictures if you have them! It's great to have you with us and do ask any questions you may have as we'd love to help.