#1 seems out of focus to me. Also, it looks like there are some underexposed areas.
#2 is good, although it looks like there is a shallow DOF, the eyes are more focused then the nose.
#3 neat shot, but the cat is lost in the background
#4 My favorite, has some neat potential due to the POV, but the exposure seems wierd. All the photos have underexposed areas IMO.
#5 Try getting down on the dogs level.
#6 Shooting in snow is tough, I think there are some adjustments to be made to make the indentations stand out more. Also the cat seems out of focus.
#7 Cute shot, try cropping in more.