Prey Drive

[caption id="attachment_55015" align="alignnone" width="680"] (Picture Credit: Haydn West - PA Images/PA Images via Getty Images)[/caption] Dogs that were bred to hunt, such as terriers, have an inborn desire to chase and sometimes kill other animals. Anything whizzing by — cats, squirrels, perhaps even cars — can trigger that instinct. Dogs that like to chase need to be leashed or kept in a fenced area when outdoors, and you'll need a high, secure fence in your yard. These breeds generally aren't a good fit for homes with smaller pets that can look like prey, such as cats, hamsters, or small dogs. Breeds that were originally used for bird hunting, on the other hand, generally won't chase, but you'll probably have a hard time getting their attention when there are birds flying by.See Dogs That Have Low Prey Drive