Drawings of Mine

Lately I've been obsessed with pen drawings. Could be because I don't have a good area to paint right now. Feel free to give real critiques. I can take it and need the feed back. Be warned these are cropped so there are some bits left out.
  1. My Best Friends dog Rainbow.
  2. My dogs boyfriend Henry. Lol! Really another friends dog.
  3. My baby, Luna being lazy.
  4. I don't just draw dogs. I sometimes draw flowers.
  5. Wait maybe I'm dog obsessed. Work in progress. Would love feedback on if I should leave the Pug simple or make it more stylized with color?