According to research by the scientists at the University of Nottingham, there has been a 50% reduction in male fertility globally, for both humans and dogs. The study shows that there are two causes. One is DEHP a common plasticizer which is found in carpets, flooring, upholstery, clothes, wires and toys as well as the industrial chemical polychlorinated biphenyl 153 (PCB). Although it has been banned world-wide, it is still found in the environment, including in food.
Another study shows that most of PCB 153 (90%) is ingested through food. The foods likely to have it are, fish and fish products, including fish oils which have the highest amount. Next are milk, eggs and dairy products and meat and meat products.
Another report has shown that foxes and deer also have the PCB’s and DEHP in their bodies. How did they get them? If wildlife has been exposed to PCB’s what about other animals such as cattle, horses, pigs, chickens, etc.?
At the Stockholm Convention on Persistent Organic Pollution (POP), PCBs were classified as POP’s and precipitating countries agreed to ban all production of PCB’s and to eliminate them by 2025. But that does not help us today or those exposed previously.
What comes to mind for me are the “editable” products that are sold as a way to clean your dog’s teeth. Most do not advertise that they are 100% digestible. What are the non-digestible ingredients? Are they plastic or some similar product?
Many dog toys are made of plastic. How does this fit into the picture? What about other chew toys made for dogs? Do they contain PCB’s and other harmful ingredients? These are all things to consider.
This is important information for the dog breeder who may experience a problem with the male dogs in their breeding program. It could be the answer as to why.
The good news is that scientists are working on a solution to solve the drop in male fertility rate and both dogs and humans will benefit from it.