We had cats that were city raised and simply did not chase the mice except for one rescue kitty who kept the whole block and then some rodent free. We moved to the country and all the old cats died and we got two new cats from a horse ranch. Now those cats are great mousers. They are mutts-alley cats. They also chase and kill lizards and scorpions. Good kitties. Although some visitor to our place got stung by one of the scorpions we sometimes see. Now none of that group of friends will come to our place. We never wear flip flops at night walking outside. I guess we needed to tell them appropriate attire. We just didn' t think of it. We will never forget again. The two cats were chasing a scorpion in the house last night. Good kitties.