Click and drag the pets to the places they want to go. To fill pet requests, click what they want, and then the pet. For grooming, click the pet, then click the meter quickly until it's full. When pets are ready to leave, click and drag them to the register. If the tub is dirty, click the cleaning spray, and then the tub. If there's poop, click the scooper, the poop, and then the garbage can. If pets get impatient, cheer them up with a treat (bones for dogs and fish for cats). But remember, the treats cost you money.