A maintained pet-specific reference has a different evidential basis. It depends on the supported history, coverage and eligibility of the actual method. Do not invent a formula or rename a short average to imply a stronger result.
Three labels to keep distinct
| Label | What it describes | What it does not establish |
|---|---|---|
| Period A mean | Mean of eligible observations selected for A | The pet's usual pattern |
| Period-to-period comparison | Difference between two defined sets of observations | Cause, clinical normality or a sustained trend |
| Maintained personal reference | A supported pet-specific reference with its own history and eligibility | A universal normal range or access to records not actually available |
The first two can be demonstrated transparently from supplied numbers. The third needs the real product source and its method, not a marketing calculation.
A fictional example
Complete values of 100, 110 and 120 mL have a mean of 110 mL. Complete values of 140 and 150 mL have a mean of 145 mL. The difference is 35 mL, approximately 31.82% relative to the first period.
These fictional means describe three and two complete-day entries. A separate 80 mL partial observation is excluded from the primary comparison. None of those facts establishes that 110 mL is the pet's usual drinking amount.
A transparent description is “Period A mean.” Calling it “healthy baseline” would add a clinical claim the example does not support.
Coverage limits the question
A period with few observations, interrupted windows or a changed method may still permit a bounded calculation. It needs those limits beside the result.
Missing days remain missing. A single different day is not enough to describe a sustained pattern. Do not use a visually smooth chart to hide unequal coverage.
Where PETICO context fits
PETICO's product material includes pet-specific context and personal-reference concepts. Their use depends on the actual supported records and method. This guide does not disclose or invent internal eligibility thresholds, weighting, refresh periods or proprietary formulas.
The current ChatGPT preview's supplied comparison does not look up private records or establish a maintained reference. General account connection does not yet make saved history available to everyone. Read the current scope.
Questions to ask of a reference
- Which pet and signal does it concern?
- Which history is available?
- What collection windows and methods are included?
- What coverage or eligibility limits apply?
- Is the result a selected-period mean or a maintained reference?
- What changed in the underlying record?
- What does the result explicitly leave unanswered?
If the method or source is unavailable, keep the reference unavailable. Do not substitute a freshly calculated average merely to fill a display.
Use the comparison guide for transparent arithmetic, and evidence and coverage for interpreting its basis.