I was gonna chime in about the black tongue for chow mixes... my boy I got from the pound as a "shepard" mix.
He's got the coloring of a rot but his head and tail are similar to yours....his tongue is pink but the roof of his mouth has black/pink splotches...that you would not notice unless he was upside down panting....
Your boy does resemble the OP dog in build alot! They are both very cute!!! I know what you mean about the hair though!! It seems I have been brushing my guy for months and it just keeps coming and coming!!! You can make sweaters for an entire city when they blow that undercoat!!! LOL
I thnk that we will list her as a Chow/Lab mix. She does not have any spots or black/blue on the tongue. Everything else seems to point toward a Chow/Lab mix. She is up for adoption. The owner was a girl that was in a car accident and is now in a coma. We run a dog rescue. Your help was greatly appreciated!!! Pepper is a great dog and we hope to find her a home soon.
She's beautiful. Right away, when I look at her face, she reminds me a little bit of a chow chow. I had one for years and I just loved him. The broadness of her face, and the intensity of the eyes give me that impression. Maybe mixed with a black lab.