How do you do a trick?

Look at the beginners book of tricks in your inventory, then read the tricks and try them out on your dog enough times for it to learn them.
Hope I helped! :D

For Petz 5 (or if you just have Dogz 5 or Catz 5 separately, like me) then you take out any treatz box you like and preferably just one pet at a time. You then get their attention by picking a teat out of the treatz box and wait until they do that little jump and watch the treat, kinda like when they start eating and they turn to jump to the bowl. Then, you can do all sorts of trickz! For example, you can wriggle the treat below the dog and it will eventually preform a 'down' trick. It says so at the bottom of the screen. When your pet lies down on it's back if that was what you waned, give the pet a treat and a pat before taking another treat out. Do not do this too much or too often unless you use healthy treatz like Olives because your pet will become fat and unhealthy!

I hope that helped!