By Natalie Thomas LVIV, Ukraine (Reuters) – At an animal shelter in the western Ukrainian city of Lviv, Natalia Horobets bid an emotional farewell to her beloved pet cat Charly on Monday. Horobets and her husband had fled their home in the eastern city of Kramatorsk as Ukrainian troops fought Russian invaders. But after a difficult journey west on a packed train they finally decided to let their pet go, concluding that setting up a new life hundreds of miles from home would be hard enough without a hyperactive cat to care for. “Our trip by train lasted for 40 hours,” Natalia Horobets said in L…