This clip is from the Joe Rogan Experience podcast #228 with Bill Burr (http://bit.ly/RvBZAN), also available via iTunes & Stitcher (http://bit.ly/1l3941d).
http://podcasts.joerogan.net/podcasts/jre-228-bill-burr-brian-redban
http://joerogan.net
Video Source
I've heard Bill Burr talk about how much he loves his dog. If someone were to explain to him that the idea behind Han Solo's buddy being a big hairy alien thing came from Lucas' dog sitting next to him in the passenger seat of his car as they drove around, that Chewie was meant to be an evolved space dog type thing then he might get it. But probably not. Actually he'd probably just say that's even more stupid. haha.