In this study, the co-infection rates of CCoV + CRCoV, CCoV + CAV-2, CCoV + CNV, CRCoV + CNV, CRCoV + CAV-2, CCoV + CAV-2 + CNV, CCoV + CRCoV + CAV-2, and CCoV + CRCoV + CNA were 2.37%, 0.77%, 0.06%, 0.24%, 0.24%, 0.06%, 0.53%, and 0.06%, respectively. The gene discussed is CAV2; the disease is coinfection.