Ok follow up question: would it be possible to ever like, fully domesticate the bantams? Im thinking like. They're small, less physically dangerous, and they are accustomed to humans. I'm thinking like, not "oh let some tiktokers breed them in their houses thisll go fine" but if you had a big proper science go at it with veterinarians and stuff over a long term period like when they did that thing to foxes or whatever. Would it ever be possible to be having like, safe pet bantams who just chill? Like i imagine you'd have to come to terms with your belongings being nibbled, like having your couch legs scratched with a cat, but with enough time and very careful genetic selection would they ever be like Dog levels of Safe instead of Cow levels of Safe?
...i originally asked this thinking about that one painting "two earthlings" and like. Sitting on the couch with my hellish corporate creation like "two H. Sapiens hybrids" (they got sapiens dna and weve got a bunch of dna from other extinct hominids in there) but now im thinking could you have hunting dog fauns. Go my creature eat the cop's tires so i can keep stealing carburettors
that's a surprisingly complicated question, but in short, no, sirens would never be safe enough to the point where they'd be similar to dogs (their brains just don't work that way socially, siren colonies are very chaotic and barely have any structure, as a result they're extremely aggressive to who/whatever creature they see as an "equal"). diggerhorns by contrast have very small social groups by faun standards and have a basic hierarchy (usually goes "dominant individual-> the individuals they choose to mate with-> their babyguys-> random unrelated individuals"), along with them being naturally unconfrontational, makes them more reasonable and common as exotic pets.
that last part of your second paragraph is what the anklebiter was bred for, they aren't sirens (hell they existed before sirens, and are actually the entire reason why sirens exist), they were originally bred from diggerhorns raised in captivity and due to this they could be trained to attack people in certain uniforms on on the command of certain sounds, even to the point were they could be taught certain noises that would distract/lure gaurdi into secluded areas (this started as teaching them to mimic the screams of distressed humans or animals, then they learned to scream noticeable words, then eventually a wide range of words at all volumes).
tl;dr if you want something that looks like a siren that can be trained and be -reasonably- safe, try a belfast anklebiter crossed with a sport line pelter mini, these are very popular in film and television, as seen by the image below.