We had a poodle who broke her leg a few days after we got her... she had a little cast/splint on... we covered it with a plastic bag when we went outside so it didnt get wet.
We let her basically do anything she wanted, she was a puppy and wanted to play... it was funny because she learned to run so good that after it was off she would still run with her leg back sometimes.
Here she is playing with it on:
http://i47.photobucket.com/albums/f1...Lover/toys.jpg
Trying to get her big sissy down from the couch (you can see a little bit of the cast):
http://i47.photobucket.com/albums/f1...over/iwant.jpg