Stop choosing a pre-built index.
Build your own.

Set the weightings. All of them.

Care more about udder health than stature? Want feed efficiency to matter more than it does in the standard indices? Move the sliders until the ranking actually reflects what you're trying to build in your herd. There's no index to settle for — you set every trait yourself, and the ranking updates instantly.

Fewer traits, faster progress

Spreading selection pressure across dozens of traits at once means every individual trait moves slowly — that's simply how multi-trait selection works: the more traits you're selecting on simultaneously, the more thinly your selection intensity gets divided among them.

Sires 4 U lets you deliberately narrow your focus to the handful of traits that matter most for your herd right now, so genetic progress on those traits isn't being diluted by twenty others you don't particularly care about this generation.

Your milk price, not a generic assumption

Built-in indices are calibrated to a specific pricing model — usually a US milk-component payment structure. If you're farming somewhere with a different reality — say, New Zealand, where payment schedules can actually penalize milk volume rather than reward it — those built-in weightings are working against you, not for you.

Sires 4 U lets you enter your own $ values for milk, fat, and protein, in $/lb or $/kg, positive or negative on any component — combined with the full US genomic proof data directly. No proof conversion, no translation layer, no accuracy lost in between.

Every bull. Every company. One list.

No more comparing bulls one marketing catalogue at a time. Sires 4 U ranks sires from every major AI company side by side, on the same scale, using the same criteria — so you're picking the best bull for your herd, not just the best bull your usual supplier happens to be promoting this season.