Well we actually took 2 chickens in the end as we still had one that had died earlier on
The results
The Maran that died yesterday had swallowed some tissue, blocked tubes, inflamed bowel, bowel infection, septsimia then died
No.2 died of a heart attack
Great so no conclusive evidence , though they did test the internals of both and said they were in extremely good condition, the vet even asked what we fed them.