You can remove paper towels after the firt day or two, as long as they know what their feed is, they will continue to eat it. You may see them picking around in the shavings and eating a little here and there, but don't worry about it.
Here's a tip on the photos. There is a preview and a submit button, you can hit preview to see what your message is going to look like before you hit submit. If the picture doesn't show up you can keep editing your message and hitting preview until you get it right. Then you hit submit.
If you submit one and it doesn't look right, you can still fix that mesage by choosing the edit button on the lower right corner of your message.