1 is a bit tight for me. Not sure about the square crop. 2 & 3 are much better, although 3 could have benefited perhaps from moving the dog slightly further right in the frame? Might even get away with a re-crop to take out that furthermost right blue leg.
Blue legs of the whatever-it-is are quite distracting. If you have the know-how, desaturating (just) them a little might help, but next time - watch your backgrounds.
The best thing is that you got down to her(?) level which massively improves the overall impact to the images. They are nicely lit and well exposed and considering you have no control over posing the dog, they are nicely posed. I especially like the pose in #1 which is why I'd really like to see a non-square crop with more room to the right of the image (although I guess those blue legs are in there?)
Focus looks a bit iffy to me. Eyes of the dog should be in focus, but I'm not sure they are. It's really hard to tell with them being so dark, so I'm not sure if it would matter to ordinary people.
As always - just my opinion. Take what you like & leave the rest!