Equine Reproduction Services, an industry leader since 1994. The ERS mobile breeding lab, owned & operated by Karen Berk, travels nationwide with services including: Semen Freezing, Stallion Collections, Phantom Training, Semen Evaluations, Troubleshooting, AI, Stallion Promotions, Lab Training. Karen’s permanent Stallion Station South is located in Ocala, Florida, she may be emailed for free E-consultations or to set up an ERS clinic.