Every train had to stop
They were aware that they needed to act quickly. Someone quickly called the two nearest train conductors and the local headquarters to inform them that they should not enter the station for the time being because they needed to send personnel on the rails to get something off it.
Not in good shape
They were not allowed to enter the railroad tracks until they received approval from everyone. That was only for their own protection, plus also allowed onlookers to have a better look at the sad puppy on the rails. It was definitely in poor condition.