The government kindly allows all sorts of poisons to enter the food chain, both ours and are animals. I mean, they practically push soy down our throats, then there is high fructose corn syrup, aspartame, and oh yeah, let's not forget Carbs in general.
So when a little pentobarbital (a euthenasia drug) slips into the dog food, no biggie. From the government standpoint anyway.
Back in 2002, the FDA released a report of their 2-year study/testing finding pentobarbital (the drug used to euthanize animals) in pet food. Their findings were that many brands of pet foods –- purchased right off of store shelves -- contained the euthanizing drug pentobarbital. With that finding, the FDA began an 8-week test to see if levels of pentobarbital in pet food could be harmful to pets. The FDA testing showed that the amounts of pentobarbital in pet food would not harm pets (even though their study only tested dogs). You should know that the FDA ran their testing on 42 twelve week-old Beagles –- and again the testing was only for 8 weeks.
Should the government crack down on pentobarbital? Nah. The last thing you really want is the Feds trying to fix things. The more they "fix", the more things break. Too much of our lives, society, daily choices are already built around government "fixes", to the point where a consumer mounted protest of pentobarbital in pet food would very likely result in the perpetrators pushing for changes to disclosure laws and labeling laws. We are almost in an unbreakable circle, where everything lives and dies by government "legality" and legislation. And where government is just a giant committee responsive only to those that scream the greenest.
A society where a company can be "too big" to allow it to fail won't be deterred by a few dead dogs.
The best you can ask for furry reader, is just knowing. Then you can exercise a few, non-government regulated options.