Scooby looks like a super dog, but if you want to tone down the barking, don't make a big fuss (or even a minor fuss) when you leave the house (none of this "I will MISS you so MUCH!!!"); likewise, when you return, act just as casual with no effusive greetings. When you make a big deal about your comings and goings, he does too and it raises anxiety levels, as well as the bark factor.
awwww what a hansome dog you are scooby!!! awww look at that super happy face!!! well i hope scooby has a long and very happy life full of biscuits!!!
well bye!