Rosies do well on mice their whole lives. They also can't handle as large of meals as most other snakes. I would wait until your snake gets a little larger before switching it over to rat pinks, if you still want to. Rat pinks are the same size as large fuzzy mice.
To post larger pics, or multiple pics, in your posts, you need to upload them to your gallery and post from there. There are several threads in the HOWTO Forum that can guide you if you don't know how