When I was a kid, a long time ago age wise - but in my mind I am still a kid, Roy Rogers had a great companion other than Trigger, Dale, or Pat Brady...Bullet was my favorite of the cadre of characters from the show. I guess dogs were always kind of special in my day. Especially dogs that could rescue you, or attack the bad guys, or protect the innocent. Bullet was one of those great dogs.
That is the main reason that Captain Spectre has his dog - Rocket. I haven't used him much in the strip, but I have plans for his future.
Just one of the many influences that goes into the strip. So here is a quick reference sketch I did to get the feel of Rocket for his part in the strip.