Not bad. Is there a thread specifically for drawings and paintings and real life art? I've got some nice stuff I'd like to share.
Only place for it, it's not a popular medium on GR ; Anywho. #1 - Proportion wise it doesn't look bad, needs the shading darkened up though, too bright at the moment so there's no real light source. I'd consider shifting his pupil further towards his mouth a bit too, unless you meant for it to be looking towards the screen but face generally pointing the other way. (By shadows I mean more, on the skin/fur as opposed to behind jutting out bits) #2 - Best one by miiiles, needs tidying up in some places but otherwise it's well done. I'd get it online and ink it in photoshop, add some text could look good. #3 - Not feeling this one, no real light source, proportions/shape looks really weird and bent on the right, it's ok but not to the level of the second.
What about something like this?(btw drawderocks doesn't care if I use his work since he is my uncle...)