I'm no expert on lizards whatsoever. It doesn't really sound like the limping is from a lack of protein or insufficient lighting. I would suspect that it was from physical problem, (such as accidentally running into a wall or it getting accidentally caught on something in the cage). A lack of nutrients would probably be more likely to cause growth problems or skin discoloration or something. I hope someone more experienced with lizards can correct me or back me up whichever is the case.

I would first thoroughly check your husbandry, http://www.ball-pythons.net/modules/...warticle&id=55

What you can do now is correct your husbandry, I really think it would be a good idea to have a reputable herp vet check out your bearded dragon, not a dogs and cats vet, you can find a list the site has here http://www.ball-pythons.net/forums/s...ad.php?t=56792

Since I am no expert on lizards, I am not able to tell how bad the scenario really is, but I believe your bearded dragon needs serious attention. I understand money can be an issue, but the investment in a vet check-up is usually not as expensive as you would anticipate. The cost is usually worth the security of knowing your pet's life is not in danger.

Keep us updated on what happens!