Ron wouldn't I want to go to the highest maximum shutter speed? I'm just confused as to why I would put it on the slowest shutter speed as you suggested 1/250 for action. Then you say that is a slow shutter speed compared to 1/500 and 1/1000. Don't I need to find a camera 1/4000 for action photos?
Good morning!
You (and others) are getting sidetracked by shutter speed vs. shutter lag.
The actual time that the shutter is open is commonly called "shutter speed", and for normal dogs running, the range of 1/250 second to 1/1000 second will be fine and stop most motion, including their moving legs.
The top shutter speed is not going to be important, as you are not planning to take a picture of a speeding bullet.
My suggestion is to get some idea of the shutter
lag time and go with what is in your budget.
According to what I read yesterday, the Nikon 1 J1 is fairly quick, small, and will accept other lenses if you so desire. The price is high, so if that is not within your budget, go with the next best thing.