The missing cat story is amazing. I heard a story on animal's amazing skills about 20 years ago and the key example was a trucker in Australia who stopped his 18 (36?) wheeler at a rest stop and to let his dog do his business. The dog started chasing a rabbit and he was on a tight schedule and had to leave the dog behind 
18 months later, the dog bounded into his front yard and into the owners arms. 1500 miles away! Wow!
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