Being a Pet Owner means that you create and maintain pets. You maintain them by buying items in the Pet Store to keep them in shape.

These things are found in the link, respectively
for Aliens
for Predators
for Marines

Every 30 minutes you are online, you will earn some Money, Resources and CPUs. To get these, you must be online at least 30 minutes as the timer counts down. When you click on the Pet's name to see its stats, the timer will reset if it has been 30 min or more.

When you click on another link after that it should give you your money, Cpus and resources.

Tip: Sometimes it takes a refresh of the page to do it.

Read more about maintaining your pet.

Read about gaining experience for you and your pet.


See also:
Pet Owner subprofessions
maintaining your pet
Pet Attacking