[MCPE-234734] New baby Rabbits, Mooshrooms, Ocelots, and Sheep are invisible with the Classic Texture Pack activated

The bug

Equipping the Classic Texture Pack breaks animal models in the following ways when the 2026 Drop 1 experiment is enabled:

Rabbit animations do not work
Baby rabbits, mooshrooms, ocelots, and sheep are invisible
Baby cows, pigs, and chickens are the size of adult mobs, with even bigger heads
Baby cats and wolves use the new models instead of the old ones

The following content log errors are produced:

[Molang][error]-minecraft:mooshroom | minecraft:mooshroom | controller.render.mooshroom | Geometries | friendly name 'geometry.baby' not found in entity friendly name list (texture.brown:geometry.default:material.default:texture.default) - check your spelling?
[Molang][error]-minecraft:mooshroom | minecraft:mooshroom | controller.render.mooshroom | Textures | friendly name 'texture.baby_default' not found in entity friendly name list (texture.brown:geometry.default:material.default:texture.default) - check your spelling?
[Molang][error]-minecraft:mooshroom | minecraft:mooshroom | controller.render.mooshroom | Textures | friendly name 'texture.baby_brown' not found in entity friendly name list (texture.brown:geometry.default:material.default:texture.default) - check your spelling?
[Molang][error]-minecraft:ocelot | minecraft:ocelot | controller.render.ocelot | Geometries | friendly name 'geometry.baby' not found in entity friendly name list (texture.wild:geometry.default:texture.red:texture.black:material.default:texture.siamese) - check your spelling?
[Molang][error]-minecraft:ocelot | minecraft:ocelot | controller.render.ocelot | Textures | friendly name 'texture.baby_wild' not found in entity friendly name list (texture.wild:geometry.default:texture.red:texture.black:material.default:texture.siamese) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Geometries | friendly name 'geometry.baby' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Textures | friendly name 'texture.baby_brown' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Textures | friendly name 'texture.baby_white' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Textures | friendly name 'texture.baby_black' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Textures | friendly name 'texture.baby_white_splotched' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Textures | friendly name 'texture.baby_gold' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Textures | friendly name 'texture.baby_salt' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:rabbit | minecraft:rabbit | controller.render.rabbit | Textures | friendly name 'texture.baby_toast' not found in entity friendly name list (texture.brown:geometry.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white:texture.white_splotched:material.default) - check your spelling?
[Molang][error]-minecraft:sheep | minecraft:sheep | controller.render.sheep | Geometries | friendly name 'geometry.baby' not found in entity friendly name list (geometry.default:geometry.sheared:material.default:texture.default) - check your spelling?
[Molang][error]-minecraft:sheep | minecraft:sheep | controller.render.sheep | Textures | friendly name 'texture.baby' not found in entity friendly name list (geometry.default:geometry.sheared:material.default:texture.default) - check your spelling?
[Molang][error]-friendly name 'geometry.baby' not found in entity friendly name list (texture.brown:geometry.default:texture.default:material.default) - check your spelling?
[Molang][error]-friendly name 'geometry.baby' not found in entity friendly name list (texture.wild:geometry.default:texture.siamese:material.default:texture.red:texture.black) - check your spelling?
[Molang][error]-friendly name 'geometry.baby' not found in entity friendly name list (texture.brown:geometry.default:texture.white:material.default:texture.black:texture.gold:texture.salt:texture.toast:texture.white_splotched) - check your spelling?
[Molang][error]-friendly name 'geometry.baby' not found in entity friendly name list (geometry.default:geometry.sheared:texture.default:material.default) - check your spelling?
[Animation][error]-Error: can't find animation riding.body
[Animation][error]-minecraft:rabbit | Error: can't find animation idle_head_tilt
[Animation][error]-minecraft:rabbit | Error: can't find animation move_baby
[Molang][error]-minecraft:rabbit | data/resource_packs/experimental_y_2026_drop_1/animation_controllers/rabbit.animation_controllers.json | animation_controllers | controller.animation.rabbit.general | states | default | transitions | moving | variable.moving | Error: unhandled request for unknown variable 'variable.moving'
[Molang][error]-minecraft:rabbit | data/resource_packs/experimental_y_2026_drop_1/animation_controllers/rabbit.animation_controllers.json | animation_controllers | controller.animation.rabbit.general | states | default | transitions | idling | !variable.moving && variable.should_idle | Error: unhandled request for unknown variable 'variable.moving'
[Molang][error]-minecraft:rabbit | Error processing expression query.is_baby ? geometry.baby : geometry.default
[Molang][error]-minecraft:mooshroom | Error processing expression query.is_baby ? geometry.baby : geometry.default
[Molang][error]-minecraft:ocelot | Error processing expression query.is_baby ? geometry.baby : geometry.default
[Molang][error]-minecraft:sheep | Error processing expression query.is_baby ? geometry.baby : array.geos[query.is_sheared]