A wellness plan collects cash on a schedule while the clinic delivers exams, tests, and discounts at different times. Cash received is therefore a poor substitute for a service-level rollforward.
A workable veterinary wellness-plan balances schedule names the entity, period, currency, source systems, cutoff, preparer, and reviewer. It also records the report filters and extraction time. Those details let the next reviewer reproduce the work instead of trusting an unexplained total.