You all might have seen this but last night we saw a chase commercial, the one with the jack russel terriers meeting at the ATM, anyway, in the beginning there is a poster in the background with a red/white b on it. We were so excited we had to rewind it to be sure. Check for it if you haven't seen it.
There is a commonly used dog in TV and commercials that is either a Rat Terrier, or a corgi/terrier/basenji/chi mix….I have seen in on law and order, and some other more recent commercials...might be that one. Or it could be a real B...I haven't seen either of the ones mentioned.