I'm not positive so don't quote me, it as been almost a year since I've taken intellectual property law but!:
Whoever presses the shutter is the copyright owner, unless a proper contract is signed. Again not positive, so check it out for yourself first.
Having said that, gorgeous dog! Just watch your posing, the first one especially comes to mind. Very awkward having a dog there >_< remember the dog is a subject as well, so you do not want your viewer to feel uncomfortable trying to look at it.
The last one is an excellent shot, it feels the most natural and while it is obviously posed the viewer forgets that simply because you look so comfortable.
If you're using a tripod and remote shutter release (or timed for that matter) you are missing your focus on almost all of these. I am sure you realize this on your own, but I think I may have a simple trick to fix this for you.
All you need is tape and something to stand in where the subject (you and your dog) will be. I use a chair as a stand in, or better yet my light stand (assuming you don't have one though so let's go with the chair)
Set the tripod and camera up, as well as placing the chair in place of your subject. This takes a little bit of planning, but it will be worth it. Once the chair is in place, set your exposure as well as focus on the chair. If the edges of the chair are slightly out of focus that should be ok as long as you can fit your body and your dog inside of the area. Put tape down where you and your dog need to be, and switch your lens to manual focus so that nothing changes. Make sure your exposure is locked down, than pop the timer on your camera and get in position.
This may be a bit diluted, I'm still waking up xD I'll check up later to see if you understood what I am saying lol. Hopefully it made sense.