[header] How to train a pet in sims 2 pets [title] To teach your pet a command, have a selected sim click on the pet, then click " teach command ". [step] There are many different options, such as sit, roll over, and more. Click one, and your sim will start to teach the pet a trick. 
A bar will appear above its head as it's learning. After it fills up, the pet has learned the trick.