https://www.businessinsider.com/nyc-exterminator-dead-rat-bodies-carbon-monoxide-2023-10
Matt Deodato, an exterminator fighting the rat battle in New York told Insider that he collapses the burrows that rats reside in after killing them with carbon monoxide.
Although, in the past, Deodato said he relied on companies to haul away the dead pests — or dear friends, to those who care — leaving them there has been beneficial, in his opinion.