how do you breed the pets, i know that you need a pet house and they need to have high relationship status' w/ the mate and the sim ; but which is the right pet house ? THX

any pet house will work you just click on the pet and there is an option to "have offspring with . . . " You just click on that and choose any female or male pet you have on your lot. A male pet can try for offspring with any other female pets on the lot who have high realtionships. You hear the pregnancy bells when they woohoo in the pet house if the pet gets pregnant