Red Angus uses a four-category system instead of the usual purebred/percentage tiers. What's distinctive is how the color and horn rules work: being off-color or horned doesn't reject your animal — it just routes it to a lower category. Here's how it works.
The Four Categories
Category 1A. The top tier — 100% Red Angus, red, and polled, with both parents registered Angus or Red Angus (or a Gen 0 founder). This is the full purebred.
Category 1B. 87% to 99.9% Red Angus, red, and polled, with both parents registered Angus-family. The high-percentage tier just below full purebred.
Category II. 87% or higher Red Angus that either fails a color/horn requirement (not red, or not polled) or doesn't have two registered parents. Needs at least one registered parent. This is where high-percentage animals land if they're off-color, horned, or only have one papered parent.
Category III. Below 87% Red Angus, with at least one registered parent. The percentage tier for lower-content crosses.
How the Categories Stack
The game checks them from highest down:
1A → 1B → II → III
An animal slots into the highest category it qualifies for. A 100% red polled animal with two registered parents is 1A. Take away the polled (make it horned) and that same animal drops to Category II — still registered, just a tier down.
Things to Know
Color and horns route, they don't reject
This is the key difference from breeds like Charolais (where black is excluded outright). A Red Angus that isn't red, or isn't polled, doesn't get turned away — it just can't reach 1A or 1B. It falls to Category II or III instead. The disqualifiers gate the top tiers; they don't bar registration.
1A and 1B need both parents registered
The two purebred categories require both sire and dam to be registered Angus or Red Angus. Drop to one registered parent and the best you can reach is Category II.
Angus counts as family
Because Red Angus and black Angus are the same breed by genetics, a registered black Angus parent counts toward the parentage requirement — not just registered Red Angus.
Percentages are whole numbers
Red Angus records paper percentage as a whole percent, not a fraction grid. The 87% line is the boundary between the high-percentage categories and Category III.
It's paper percent, not genetics
Everything keys off the parents' registration papers, not raw genetic makeup. Register your foundation stock first.
Summary
For the top tier, you want 100% red polled with two registered parents (1A), or 87%+ for 1B. If your animal is off-color, horned, or has only one registered parent, it still registers — it just lands in Category II (87%+) or Category III (under 87%). Color and horns route between categories; they never reject.