In most service sectors the customer and the subject of the work are the same person. In animal services they are not. The owner books, pays and receives the messages; the animal is what the appointment, the stay, the groom or the adoption is actually about. A household may have three animals of two species with different vaccination cycles, different handling notes and different needs, and a single animal may change hands when it is rehomed. Software that keeps one customer record with a free-text box for the pet breaks the moment a second animal is added. Every topic in this sector therefore starts from an animal record linked to an owner account: species, breed, date of birth, microchip number, vaccinations, behaviour notes and signed consent, with reminders and checks driven from the animal rather than the owner.
The second shared fact is that the vaccination record is a gate. A kennel will not confirm a stay, a groomer will not take a dog and a daycare will not admit a puppy until the record meets the rules the business sets, and those rules differ from one business to the next. The systems we scope apply the rules the business gives us, hold the booking when a record is missing or lapsed, and record who released the hold. They do not decide what the rules should be; that stays with the business and its veterinary advisers.
Capacity is counted differently in each topic, and that is where generic booking tools fail. A veterinary practice books a vet, a nurse and a room or theatre for one appointment. A groomer books a table or a van for a duration set by the size and coat of the dog. A kennel counts units by night and may let two animals from one home share. A rescue has no capacity at all in the booking sense, but it does have home-checkers with availability and animals whose published status the public must be able to rely on. A pet shop counts stock per bag weight and plans a van round from the orders it has taken. Each topic page describes the capacity model that fits and the scoping questions that decide it.
Finally, the sector lives on repeat business measured in cycles: boosters, worming, grooming every six weeks, the monthly bag of food, the follow-up six weeks after adoption. Reminders generated from the record, recurring appointments, repeat orders and post-adoption check-ins are what turn a first visit into a regular one. Existing clinical practice management systems, microchip databases and the licensing records a business keeps are treated as integrations or exports, never as something the software claims to certify.