They are in reshoot, and hopefully the dead bird is going away.
Amazingly, the production doesn't have money for CGI or a real for a big train scene.
I wonder what's left of Segio Leone's trains in Spain, or where some old trains are available internationally. For that matter, there are plenty of US train collections, and pieces could be shipped to the set.
There's always narrow gauge available, with backgrounds put in.
Disney needs a train scene to tie in with Thunder Mountain.
Budget? This is Disney, and its a long term investment.
I could have told them John Carter would be a flop early on, and saved them a couple of hundred million.
There's a new piece in Indian Country today on Depp and the Lone Ranger. Worth reading and watching, IMO. Everyone involved seems determined to do this right.