“Male dog fertility in rapid decline, new research shows”

http://www.upi.com/Science_News/2016/08/09/Male-dog-fertility-in-rapid-decline-new-research-shows/7771470747666/?nll=1

For 26 years, between 1988 and 2014, a team of researchers collected and analyzed sperm samples from five dog breeds, including the Labrador retriever, golden retriever, curly coat retriever, border collie and German shepherd. The results, detailed this week in the journal Scientific Reports, suggest canine fertility is rapidly declining.