Icy's Better Horses — 2026-05-19 Change Log

A consolidated summary of every change made today. Mod target: Minecraft 1.21.11 / 26.1.2 (Fabric).

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1. New per-horse traits

Each AbstractHorse now persists three new pieces of data in addition to the existing bond:

Trait	Type	Notes
Gender	MALE / FEMALE	Synched + saved to NBT. Donkeys/mules also get a gender.
Breed	one of 15 breeds, or a species placeholder	Only real horses (Horse.class) use real breeds; donkeys/mules/skeleton/zombie horses get a species label.
Mixed-breed flag	boolean	True when a child inherits from two different-breed parents — display gets a (mix) suffix.

Files: HorseGender.java, HorseBreed.java, IHorseData.java, AbstractHorseMixin.java.

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2. Horse Info Screen (P key while mounted)

Pressing P while riding a horse now opens a screen showing the horse's full profile. Pressing P while NOT mounted still whistles other horses as before.

The screen shows:

• Gender
• Breed (with (mix) suffix if cross-bred)
• Coat (color + markings, e.g. Brown + White Field)
• Bond — raw value X / 100 with bar
• Speed — X.X blk/s with bar
• Jump — X.XX blk with bar
• Health — X.X HP with bar

Bars are zero-baselined (fill = value / max) and use mod-attainable ceilings derived from the bond multiplier:

Stat	Min	Max (full bond)
Speed	0 blk/s	25.52 blk/s (0.3375 × 1.75 × 43.2)
Jump	0 blk	9.50 blk (1.0 × 1.75 × 6 − 1)
Health	0 HP	30 HP

Files: HorseInfoScreen.java, IcysBetterHorsesClient.java.

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3. Upgraded-saddle HUD now shows Breed + Gender

When you hold the upgraded saddle and look at a horse, the in-world stats HUD shows four lines under the title:

Horse Stats
Gender: <m/f>
Breed: <breed>
Speed: <blk/s>
Jump: <blk>

File: GuiMixin.java.

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4. Gender-gated breeding

• A new mixin (AnimalMixin) makes Animal.canMate return false when both sides are AbstractHorse and share a gender.
• If you feed a golden apple to a horse whose neighbor is already in love mode and same gender, the apple is still consumed, love mode is reset on this horse, and the player gets "These horses are the same gender and can't breed." in chat.

File: AnimalMixin.java, plus the existing fedFood RETURN hook in AbstractHorseMixin.

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5. Child inheritance

When two horses successfully breed:

1. Gender — random 50/50 for the child.
2. Breed —
   • Same-breed parents → child gets that breed (no mix suffix).
   • Different breeds → child gets one parent's breed at 50/50 + (mix) suffix.
   • Cross-species (e.g. horse + donkey) → child gets the appropriate species placeholder.
3. Stat inheritance for HP / speed / jump:
   • child = max(parent1, parent2) + delta
   • delta is a uniform random in display units: -0.5 to +1.0 (HP, blk/s, blk).
   • Clamped at the vanilla base ceiling (HP 30, raw speed 0.3375, raw jump 1.0) so no amount of breeding can push past the mod-attainable max.
4. Coat — re-rolled from the child breed's allowed coat list.

File: AnimalMixin.java.

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6. Breed → Coat binding

Each real breed has its own list of allowed vanilla coats (Variant × Markings). Coats follow breed:

• New horses — coat is forced from the breed's allowed list when the horse spawns.
• Pre-existing horses (already in the world before this update) — keep their current coat and the mod infers a breed from that coat. Fallback breed if no match: Mustang.
• Bred children — coat re-rolled from the child's inherited breed.

Mapping:

Breed	Allowed coats
Thoroughbred	Brown · Chestnut · Black · Dark Brown · Brown+White · Chestnut+White
Arabian	Gray · Gray+White · White · Chestnut · Brown · Black
Quarter	Chestnut · Chestnut+White · Brown · Brown+White · Black+White · Creamy+White
Friesian	Black
Andalusian	Gray · White · Black · Chestnut
Percheron	Gray · Black · White
Clydesdale	Brown+White Field · Black+White Field · Dark Brown+White Field · Chestnut+White Field
Shire	Black+White Field · Brown+White Field · Gray+White Field · Dark Brown+White Field
Belgian	Chestnut · Chestnut+White · Creamy · Creamy+White
Icelandic	Chestnut+White Field · Brown+White Field · Black+White · Gray+White Field · Creamy+White Field · Dark Brown+White
Mustang	Dark Brown · Brown · Chestnut · Black · Dark Brown+White · Chestnut+White Field
Haflinger	Chestnut+White · Chestnut · Creamy+White
Morgan	Brown · Chestnut · Black · Dark Brown · Brown+White
American Paint	Brown+White Field · Black+White Field · Chestnut+White Field · Dark Brown+White Field · White+White Field · Creamy+White Field
Appaloosa	White+Black Dots · Gray+Black Dots · Chestnut+White Dots · Brown+White Dots · Black+White Dots · Dark Brown+White Dots

Files: HorseBreed.java, HorseAccessor.java (Invoker for Horse.setVariantAndMarkings).

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7. Spawn-group same-breed + biome-locked breeds

• Same-breed spawn groups — all horses that spawn together as a natural group share one breed. Implemented by a custom BhHorseGroupData : SpawnGroupData that is passed between siblings inside finalizeSpawn.
• Biome-locked breeds — the breed chosen for a fresh spawn group is picked at random from the list of breeds that are allowed in that biome. If the biome has no entry in the table, fallback to a random breed.

Breed	Allowed biomes
Thoroughbred	Plains · Sunflower Plains · Meadow · Forest · Birch Forest
Arabian	Desert · Badlands · Eroded Badlands · Savanna · Savanna Plateau · Windswept Savanna
Quarter	Plains · Sunflower Plains · Savanna · Savanna Plateau · Windswept Savanna
Friesian	Dark Forest · Forest · Pale Garden · Old Growth Spruce Taiga · Taiga
Andalusian	Meadow · Cherry Grove · Flower Forest · Plains · Forest
Percheron	Old Growth Spruce Taiga · Forest · Meadow · Plains
Clydesdale	Windswept Hills · Windswept Gravelly Hills · Windswept Forest · Old Growth Pine Taiga
Shire	Forest · Birch Forest · Old Growth Birch Forest · Windswept Forest · Dark Forest
Belgian	Taiga · Old Growth Spruce Taiga · Old Growth Pine Taiga · Forest
Icelandic	Snowy Plains · Snowy Taiga · Ice Spikes · Frozen Peaks · Jagged Peaks · Snowy Slopes · Grove
Mustang	Plains · Savanna · Windswept Hills · Badlands · Wooded Badlands · Sparse Jungle
Haflinger	Snowy Slopes · Grove · Meadow · Frozen Peaks · Jagged Peaks · Stony Peaks
Morgan	Plains · Sunflower Plains · Forest · Birch Forest · Meadow
American Paint	Plains · Sunflower Plains · Savanna · Sparse Jungle
Appaloosa	Plains · Wooded Badlands · Savanna Plateau · Sunflower Plains

Files: HorseBreed.java, BhHorseGroupData.java, AbstractHorseMixin.java.

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8. Translations added

assets/icys-better-horses/lang/en_us.json now contains keys for:

• Info-screen labels: screen.icys-better-horses.info.{gender,breed,coat,bond,speed,jump,health}
• HUD lines: hud.icys-better-horses.{gender,breed}
• Genders: gender.icys-better-horses.{male,female}
• All 15 breeds + 5 species placeholders + mix_format
• Coat colors (7) + markings (4) + combined formatter
• Message: message.icys-better-horses.same_gender_breed

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9. Mixin registration changes

icys-better-horses.mixins.json now also references:

• AnimalMixin (server-side)
• HorseAccessor (server-side; Invoker)

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