Animals in general and baby animals specifically (when active) are hard to photograph -they just won't hold still. Dogs just move too much for my taste so it's tough to get the composition right without the dog wandering/running out of the frame...
To shoot dogs outdoors it will take a massive amount of time and patience to get a great shot. Focus, exposure, composition, depth of field and even white balance are your enemies that you have to battle. But I guess I don't have to tell you that.
Most good shots I took were pure luck and not planned when shooting dogs.
I like #4 best. Make sure to align the photo so that the door frame is parallel to the edge and the dog doesn't lean towards the right. I'd like to see a bit more negative space on the top though. Still good capture.
#2 is a great concept but the broom on the wall kills it.
#5 Too shallow depth of field. Not always but mostly the eyes should be in focus. I'd only dare to have the tongue in focus if it's a super close-up.