Pheno is the coat-colour genetics extension from RPHU Equine Genetics Testing Lab. It drops a report into every Horse Reality profile — base + dilutions, hidden modifiers, pass-on chances, and lethal-allele warnings, laid out the way a breeder actually reads a pedigree.
Works on every horse profile at www.horsereality.com. Reads what's on the page; doesn't send your data anywhere unless you opt in to anonymous usage stats.
The same letterhead report the lab stamps on every specimen — genotype, modifiers, and what a horse can pass to a foal.
Extension + agouti decoded to a base colour. Cream, pearl, dun, champagne, silver, mushroom layered on top, with the right HR wiki name (Buckskin, Grullo, Sable Champagne, …). Sooty, flaxen, pangaré, and grey applied as overlays.
Two parents, two taglines — Pheno scores Likely / Possible / Unlikely for each untestable modifier so you don't have to guess from a sire+dam page.
Every locus the horse can pass to a foal, the percentage, and a red LETHAL flag for W3/W8/W10/W16/W19/W21 or OLW. The flag is scoped to the gene actually carrying the lethal allele — Tobiano never wears a warning that belongs to White Spotting.
The horse's owner can toggle visible-only modifiers (sooty, hidden sabino, etc.) and pick a grey / leopard / tobiano shade. Choices sync via a small backend, so every other Pheno user viewing the profile sees what the owner set.
Every profile gets a lab-style readout: the recognised colour, the full genotype, and a pass-on table that flags lethal alleles on the gene that actually carries them.
Sire × Dam — Extension locus
Pheno reads both parents and works the loci like a Punnett square — so before you commit a pairing you can see the base colours, dilutions, and modifiers a foal is likely to inherit, with lethal combinations flagged.
Pheno reads what your browser is already showing you. It never sends horse data, breeder names, or genotypes anywhere. Anonymous usage stats (panel opens, feature toggles flipped, errors) are off by default — Pheno asks once via a banner in the panel, and you can flip the choice any time from the panel footer.
The questions breeders ask before they install — answered straight.
Yes — Pheno is completely free. Install it from the Chrome Web Store and it starts reading horses the moment you open a profile.
No account is needed to read the genetics panel — genotype, modifiers, pass-on chances, and lethal-allele warnings all work straight away. A free account is only required if you want to save horses to your collection and plan pairings.
Any desktop Chromium browser — Google Chrome, Microsoft Edge, Brave, Opera, and the like. Pheno is published on the Chrome Web Store and installs the same way on all of them.
Pheno is a desktop browser extension, so it lives in desktop browsers — Chrome, Edge, Brave, and other Chromium-based browsers. It isn't available on phones or tablets: mobile browsers (including everything on iPhone and iPad) don't support this kind of extension, and account sign-in won't work there. For the full experience — genetics reports, your collection, and breeding projections — open Horse Reality on a desktop Chromium browser with Pheno installed.
On every horse profile at www.horsereality.com. Open a horse and the Pheno tab slides in with its full coat-colour report — it only reads what's already on the page.
Pheno only reads what your browser is already showing you — it never sends horse data, breeder names, or genotypes anywhere. Anonymous usage stats are off by default, and you can flip the choice any time from the panel.
“Every horse on Horse Reality is already carrying its genotype. Pheno just reads it back to you — base, dilutions, the hidden modifiers, and the alleles you'd never want to double up by accident.”
Free, install in seconds, and it starts reading horses the moment you open one.
Get the extension →