guinea pig front paw

Question
I cleaned our piggies cage two night ago and they both seemed great.  But today I noticed one of our guinea pigs is limping around.  He's holding his right front paw up.  I have no idea what's wrong.  

Answer
My first suggestion is to start doing a daily health check where you should make sure their ears are clean, teeth straight and white-ish, eyes and nose clean, coat shiny, claws straight and not too long, and put a small amount of pressure on each leg to feel for any soft points where there could be an injury. My second suggestion is to take your piggy to the vet, if you do not yet have a vet with a practioner of small animals degree within your area, go to vetlocater.com and go to advanced search (guinea pigs are considered "pocket pets"). Good wishes to your piggy.