In an alternate universe where other groups explored the world before Europeans, what new animals could have been domesticated? In my alternate history world, the Malagasy that came to Madagascar not only land there but also landed in the Mascarene Islands.
There are many roles a domesticated animal can be used for. The major ones are farm labor, dairy production, meat production, clothing production, transportation, pets, pest control, egg production, and hunting/guarding. Other animal roles include things like experimentation and sending messages and a few other things I have missed.
An animal needs 3 main qualities in order to be domesticated. Firstly, it must be able to be controlled by humans. It cannot be too large and dangerous. It also cannot easily disrupt human efforts to control it. Secondly, it must make a lot of babies in a short amount of time. That way, selective breeding and culling of the unwanted offspring can happen. Finally, feeding this animal must be easy. Ideally, the animal eats things humans don't eat like grass but any animal that overall eats less than a human can work.
So given these qualities, could the Dodo bird have been domesticated by the Malagasy? They had appropriate technology and could have used a flightless bird for chicken and egg production (like a chicken substitute). The issue is that Mauritius has limited space and invasive species could wreck havoc on the habitat.