Okay, not exactly a "pet story" but from Reuters:
A South African zoo is trying to persuade its star chimpanzee to kick a bad smoking habit.Charlie, a grown male chimp and the Bloemfontein Zoo, has been picking up cigarettes thrown to him by visitors and smoking them -- a habit he probably picked up by observing humans, zoo officials told the SAPA news agency on Thursday.
"Baby chimps pick up habits by mimicking adults and we think he started mimicking smokers at his enclosure which probably led to smokers throwing him cigarettes," spokesman Daryl Barnes told SAPA.