No. The math runs in your existing DOB widget, which handles leap years, target-date logic, and species-specific conversion rules according to whatever formula it has loaded. SleekRank reads the variant row from your sheet and renders the surrounding copy, the conversion-rule label, the intro tuned to the species, and the variant-specific FAQs. The widget consumes the conversion_rule column as a parameter so the math stays accurate per variant.

Treat the conversion rule as data. The legacy multiply-by-seven formula was superseded by a 2019 epigenetic study published in Cell Systems that produced a 16*ln(dog age)+31 curve. When the next research update lands, edit the conversion_rule column in the relevant rows and flush. Every dog-related variant page picks up the updated rule. The widget itself does not need a code change unless it is enforcing a hardcoded rule.

Yes. The faqs column drives a list mapping that renders both the visible FAQs and the JSON-LD FAQPage schema. /age/dog-years/ ships dog-specific FAQs about life-stage equivalents and breed-size variance; /age/cat-years/ ships cat-specific FAQs about indoor versus outdoor lifespan averages. Both pages share the same schema template but the entries vary because the row varies.

Let the widget handle leap-year math through whatever date library it uses, like JavaScript's Date object or PHP's DateTime class. Surface the gotcha in the FAQ column: a person born on February 29 ages by one calendar year on March 1 in non-leap years per common-law convention. The widget does the right thing automatically; the FAQ explains why for users who notice the edge case.

Yes. Add a /age/corrected-age-for-preemies/ variant with a conversion_rule that takes both birth date and gestational age at birth, subtracts weeks of prematurity, and outputs a corrected developmental age. The intro should reference the AAP guidance on using corrected age up to 24 months. The widget handles the math; the row supplies the medical context and FAQ entries.

Be honest in the copy. Rabbit and ferret aging tables vary widely across sources. The conversion_rule column can hold a best-effort table reference and the intro and FAQ columns should cite which source the page is following. Linking to the primary source builds trust and gives users a way to verify against the underlying veterinary literature rather than relying on the calculator output as a black box.

Yes. Add a variant row for /age/age-difference-between-two-dates/ where the widget takes two date inputs rather than one. The conversion_rule column can describe the subtraction and the round-to-years convention. The page sits in the same SleekRank page group as the species variants because they share the underlying DOB widget pattern, even though the inputs differ slightly.

Easily. Fifty variant pages is well under the threshold where SleekRank starts caring about render cost. The sheet stays manageable as a single document. The widget stays unchanged. Adding a new variant is a sheet row plus a slug. The bottleneck is editorial: writing 200-300 words of substantive species-specific or audience-specific copy per variant so each page earns its place in the index rather than reading like the same article with the species name swapped.