This type of question puzzles me. What would you do if you slammed your hand in a heavy door and broke several bones in it? Sit around and type questions about it, or get to the hospital? Fractures...
You could probably just buy some dog aspirin from your local pet store or from somewhere like amazon.com NEVER give a cat medicine that is meant for a dog or vice versa. Giving an animal the wrong...
YOU TAKE THEM TO THE VET! If you think it may be broken, don't touch his/hers ribs or you migth hurt them , and definitely DON"T PICK THEM UP. You could make it worse.