Will changing an adopted shelter dog's name cause confusion?

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

1. 1
   Introducing the new name alongside the current name and slowly dropping the old name
2. 2
   Using positive reinforcement, treats, and repetition when saying the new name
3. 3
   Keeping the original shelter name if it fits well or if the dog responds strongly to it

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.