Dog, Cat & Budgie

The title for this will be, "I Love You, Food". I didn't make that title up. I think it came from LOL cats. I saw it on the internet with photo of a cat and squirrel. I'm making two, one for a gift.
Saturday night we were watching TV and the weirdest sound came up from the basement. It took a second to realize that it was Truman. He was howling. It was long, loud and eerie. I've never heard anything as mournful or creepy in my life. I went downstairs and Truman was laying on the futon. He was done howling and he just looked at me like,"what?" I think he woke himself up . I've seen him growl and twitch in his sleep, but this took the cake.
Do dogs have deep, sad thoughts? I'll never know.