Quite a few things came to mind looking at these.
#1 is exciting, probably the best looking rug, er dog, in action - but it's tilted !
In the excitement of the action, don't forget to level the camera
#2 is fantastic, great action, great eyes.
I see a hint you might have used the centre focus point, the dog is almost centred.
You might try cropping it from the right and bottom to move the dog to the right, and a sliver off the top - but don't cut the tube.
#3 is lovely, the focus is spot on. But it looks a little dark around the muzzle.
I would shoot in raw, it's easier in post-production to lighten the face to bring out the dark hair.
#4 is a good looking rug, er dog. But over exposed a bit ?
Looks like the sun came out perhaps. It's a shade over exposed compared to #3.
Apart form shooting RAW, if you're shooting manual keep an eye on the exposure.
I haven't learned (in 40 years) to get the exposure spot on as the light changes as clouds come and go without checking the meter - some people can and I'm in awe of them.
Yes, if I'm shooting action in changing light I often get lazy and switch to Tv mode so I can get the motion blur I want and not worry about the exposure.
Usually the shutter speed is more important to me than the depth of field. If the aperture gets too far away from what I want I'll compromise on the shutter speed, or the ISO to get back to the DoF I want.