Patent ID: 7276535

Claim:
A method of sterilizing a male animal having scrotal testes with seminiferous tubules flowably connected to a head of an epididymis by tubuli recti, rete testis and ductuli efferentes, said method comprising locating the head of the epididymis in each testis and injecting a chemical sterilant into a dorsal cranial portion of the testis beside the head of the epididymis, said chemical sterilant being an aqueous solution of a mineral gluconate salt and an amino acid capable of forming the solution, said aqueous solution neutralized to a pH in the range of 6.0 to 7.5, said chemical sterilant injected in an amount effective to inhibit spermatogenesis and the transport of sperm through the tubuli recti, rete testis or ductuli efferentes into the head of the epididymis, said animal being a dog or a cat and the mineral gluconate salt being zinc gluconate and the amino acid being I-arginine.