Unlike some other villains I am always kind to the animals in my menagerie, though admittedly I was forced to consolidate their dwelling units. Each cage has 6 animals in it now. Press play below a cage to hear the animals inside; they always call out in the same order. If you were to write out, in order, the first letters of the names of the animals in any single cage, you’d have a 6-letter string. Arrange the 3 cages just right and those strings, run together, spell out the name of our favorite song. One consonant is missing from that title: that letter will help you eliminate suspects. I keep things pretty orderly, so you don’t need to re-arrange the animals within any cage, just determine which cage is first, which second, and which third.
And for you visual people, here’s my vision board showing every animal in my collection, plus some others I don’t have yet but want to. If it isn’t pictured below, it isn’t in my cages. And if your message isn’t making sense, don’t always blame your ears: remember that some animals go by more than one name.