A bit unusual for a vet to operate as a sole proprietorship but I guess it is what it is.

It is established that CNC is ordinary income and it would be right to report it in Part II of F.4797.  It should not be subject to NIIT.

Prima facie, goodwill is subject to NIIT pursuant to §1411(c)(1)(A)(i) and §§1.1411-1(d)(11) unless an argument can be made in reliance on §§1.469-2T(c)(7)(i).