how can i teach my cats to catch bugs and other critters that enter the house? i have 2 neutered brothers, 5 years old, and have until just recently been exclusively indoor cats. now we have a fenced backyard that we allow them to roam. problem is, they don't chase anything either indoors or out. we're in a new subdivision, so some spiders, bugs, and mice are not uncommon in the homes. i want my cats to not rest until they have caught anything living inside the house that isn't a person or the other cat. instead, they don't chase anything or do anything. i've seen them watch a bug crawl across the floor half asleep and do nothing. i've seen them in the backyard watch birds land on the fence only a few feet away and do nothing. what can i do? please help!!