Meet Krista, a cat from Cat Care Society. She came to Cat Care Society in October 2001 when she was only 3,5 weeks old. She was adopted in December 2001. But she changed owners somewhere in 2006. Krista had no issues until the boyfriend of the owner started brining his dog over. She started doing her business outside the litter-box when the dog was there. She was terrified of that dog and was brought back to the Cat Care Society in 2006, she has been there for 7 years already(!)."
Link to Cats & Co