Not for a pet care client — for a wellness practice — but the mechanism is the
same one a groomer or a boarding facility needs. A custom WordPress plugin: session types,
availability rules, transactional email, cancellations, and a two-way sync with the owner's
own Google Calendar, so a dentist appointment removes a bookable slot and a new booking
appears on the phone in their pocket.
It handles the parts that off-the-shelf scheduling gets wrong. Timezones stored canonically
and not guessed at. A double-booking guard that re-checks at the moment of booking rather
than when the calendar was drawn. Cancel links that need a deliberate second click, so an
email provider's link prefetcher can't quietly cancel somebody's reservation.
The full write-up is here. The point for a pet care
business is narrower: if the scheduling tool you want doesn't exist, or costs more every
month than it saves, it can be built — and it can belong to you and not to a
subscription.