The sunset picture looks really boring. And I'm not just saying that.
One, the colors don't really work with what it's supposed to be, they also clash with eachother. You have the yellow sun which is clearly above the hills, and yet the hills are mostly blue even on the parts that should be facing the sun. The colors just don't work, and that's basically the most important part of any watercolor painting.
Again, with the blue jay, although you have the highlight on the eye, there's no highlight on the feathers or on the beak. This makes it look flat and uninteresting. It's also shaped weird.
With the rat, it's a bit better but it's still not okay, lighting-wise. Although the grass appears to be very vibrant and green, as if to be reflecting light, the light is not reflected on (from the grass) the rat, or off (from the light source) the rat. This, again, makes it look dull and fake. The anatomy is also questionable.
The dog painting is better, however the angle is very common and simple. The lighting is okay. I noticed that you have decent shading and coloring in that one, even though the other ones don't, which, if this is newer than the others, you've improved. Still, the background looks a bit too vibrant and bright and solid which takes away from the dog itself, so I still think you need a lot of improvement. Keep trying.
