Interesting new contraception for rats. May be interesting for feral cats?

A new rat control product came out called ContraPest. ContraPest uses 4-vinylcyclohexene diepoxide which is a model chemical for ovotoxicity. It keeps female rats from getting pregnant. They suggest using it along with poison and not as a stand alone. I'd love to see their research used by itself. It sounds like something that might be good with feral cat colonies. Obviously not used with poison, just as birth control. The price appears affordable. 

Below is the product label.

https://cdn.shopify.com/s/files/1/0255/4986/5032/files/ContraPest_Insert_Label_03252021.pdf?v=1619021143

I just Googled animal contraception. There are many products out there today. Amazing that Dr Gary Michelson, Found Animals Foundation and his $75,000,000 Prize were never able to find or develop a product. This proves that the Prize was just a way for Gary Michelson to get people to want to beg him for money. He started the Prize around 2006 or so. It's been 16 years. I remember when he said in December 2006 that he would solve the pet overpopulation problem. I really thought he could do it. He didn't even try to fix it. Failure. 

Mary Cummins of Animal Advocates is a wildlife rehabilitator licensed by the California Department of Fish and Game and the USDA. Mary Cummins is also a licensed real estate appraiser in Los Angeles, California.

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