Nat -- what do you mean you're "just starting" -- I've seen some pretty fantastic shots that you have taken. I do a lot of dog show photography (going to a show tomorrow). It can be very difficult to get the "right" shot because the activity is so dynamic. Exhibitors will may times pause to give you the opportunity for a good shot (I also show, so I'm on both ends of it), but my best advice is shoot tons of pics. There will be diamonds among the rough.
Both the Irish and the Sheltie seem a bit soft. The Sheltie also has some shadow issues. #3 is absolutely gorgeous and very dynamic with the wind in the hair. The Pharoh Hound is a nice action shot. And, #5 is absolutely beautiful. The only thing I'd like on that one is the eyes open a wee bit more.
Super shot, Nat.