Section 524.463 - Copper naphthenate(a)Amount. The drug is a 37.5 percent solution of copper naphthenate.(b)Sponsors. See Nos. 017135, 054771, and 058829 in § 510.600(c) of this chapter.(c)Conditions of use in horses -(1)Amount. Apply daily to affected hooves until fully healed.(2)Indications for use. As an aid in treating horses and ponies for thrush caused by organisms susceptible to copper naphthenate.(3)Limitations. Use on horses and ponies only. Avoid contact around eyes. Do not contaminate feed. Do not use in horses intended for human consumption.47 FR 4250, Jan. 29, 1982, as amended at 68 FR 55825, Sept. 29, 2003; 71 FR 38074, July 5, 2006; 79 FR 10967, Feb. 27, 2014