Welcome to YT!
Speaking form experience, I would recommend and expen. I didn't listen when I got Gizmo, and I'm kicking myself because of that. Anywho, just make sure you supervize your little guy like that other posters mentioned. It's not unheard of these little guys thinking they can play with the big boys. One of Gizmo's favorite breeds to tussle with is the Pit Bull, so just make sure both have play time together supervised, but have time apart alone as well. Like kids, they need their alone space too!