Licensing a pet such as a dog typically comes with a small fee. However, in some places, a dog owner may be able to get a free or reduced-price dog license if his dog is altered. Some areas also offer discounts or fee waivers to the disabled and elderly.
The fees for pet licenses help fund an area's local animal control services. Some cities require a breeding permit in addition to a license if a pet is unaltered. An unaltered pet can potentially cause more stress to local animal control services if it has an unwanted litter, so the extra fee helps offset that.