I suspect that those animals are all eaten. There are a lot of hungry people in India.
As for suffering, I doubt that there is much. Most farmers know how to butcher animals. The idea that you need to be a “professional” in order to do anything competently, is a fabrication of the last 60 years, and then only in the wealthy western world.
If that's true I have no problems with it as long as the kill is humane. But if the meat is going to waste then it verges on criminal. Better to send US the meat so we can send it to the homeless shelters.
There was a “Far Side” cartoon where an American Indian was holding up an odd-shaped bone or piece of cartilage and saying to another Indian: “We don’t know what this is, but it’s the only part of the buffalo we don’t use.”