Sometimes dogs limp or appear to be limping on the paws opposite to the one that actually hurts. If you still can't find anything, you should probably consult your vet. I doubt it's related to getting fixed, but crazier things have happened.
Your legal entities are required to pay payroll tax and social insurance such as social security on your payroll. In Oracle Fusion Applications, you can register payroll statutory units to pay and report on payroll tax and social insurance on behalf of many of your legal entities.
Also note that businesses need an occupational business license regadless of the business structure, that is whether sole owner, LLC or corporation. Also, if the business has more than one member, or you will file a corporation, you will need a federal tax ID number. Finally, Starting a business fist step is to select the tax legal structure. 1. Sole proprietor, 2. Partnership, and 3. Corporation or Limited Liability Company.