The Abondoned, DS9 3
Quark accidentally smuggles a Jem’Hadar infant (they grow up so fast!) onto the station. Kira wants to kill it, Sisko wants to farm it out to Starfleet for study, but Odo (bristling at the idea of it living in a lab) uses his status as a “Founder” to try and domesticate him.
Not a lot of luck.
Sisko allows Odo to drop him off in the Gamma Quadrant, like throwing a fish back in a pond. Not a smart move, maybe, but for Odo sometimes you bend.