I've had my pet for 110 weeks (about 2 years) Something I've noticed is that almost every pet is either sad or lonely. This is a result of the fact that people simply don't go around cuddling people's pets every day like when they were first introduced, except a few angels of course.
For a very long time, I've thought that it could have been an idea to make it more awarding for others to go around petting pets. This could be, for example, giving an achievement after having cuddled a certain amount of pets. This would encourage more people to go around and petting each other's pets. This could also encourage students to get pets, as it wouldn't just drain their wallet with the amount of food they eat.
Customer support service by UserEcho