Well, get out your 'egg timers'
I think they were appearing at 6 minute intervals for the first bit. I still have an old record of how my laptop was acting.
Every 6 minutes your HHH
goes down, right after that happens a leaf floats by (supposed to anyway). Watch the Hunger and Happiness particularly. Those go down quickly while watching.
Remove animated objects from your room. Those seem to impede the floating leaves. (Windows that have animation, items that move or activate.)
If you want a QUICK happiness boost, feed your pet Marshmallows. Keep other food on hand. The hunger meter goes down about 2 points per 6 minutes.
If happiness becomes a huge issue, place your pet in front of the TV (this is the only animated object that does not follow the rule) Turn on the power and let the pics cycle through, exit out of the remote without turning off the power. Your pet should be sitting on the couch. Sleeping stops the leaves from floating by and the happiness does not increase, even if the TV is on and your pet is asleep.
Keep your dock stock relatively low in items.
The more graphics it has to load up, the harder it has to work to get those leaves.