They are released while the chompy pod is active and not deflated there tiny and green though so you will have too zoom in to find them if you don't catch them in time they will create a chompy burrow which is a small one tile pile of dirt and hole.
Even after they deflate there's usually at least one of them running around. I almost never seem to catch the pods while they're active, so this quest took me a few days to complete...
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Activate username: "midas73". I am on a gifting hiatus so be warned...