Or they could just accept the fact that they're trying to sell something that reproduces naturally. Pet stores don't say "you can't breed these rabbits" - they either neuter them themselves or they deal with the fact that someone else might someday have extra rabbits to sell. It takes a lot of investment (sort of...as a geneticist myself, it's not even a million dollars or anything until you start futzing with the FDA and other gov't entities) so you should just make your distribution method more convenient than anyone else's & your prices competitive with whatever else is out there, even if the other stuff is basically selling exact copies of your product without the scientific investment.
If the cost of "food safety research" was borne by the regulatory bodies that demand it instead of the private companies hoping to sell food, there wouldn't be a need to have indefinite gene patents and teams of lawyers protecting the hundreds of millions of investment in a product. Genetics is cheap, it's all the regulatory crap that makes Monsanto have to behave like thugs to maintain profitability.
(not saying they wouldn't abuse the system to continue behaving like thugs while being incredibly profitable in my alternate setup, but there would be space for alternative, 'nice', companies to exist, and presumably people would recognize that "we hate monsanto, let's buy from otnasnom instead")