2.11 Allergy Is Not the Default Explanation

Allergy can exist, but it is not the default explanation for every loose stool, skin output, greasy coat, itch, or coat change.

Feline FBM checks food structure, Ingredient State, fat freshness, fat processing, and local skin environment before defaulting to allergy.

Allergy belongs to a boundary branch, not the default branch. This page does not deny real allergy. It stops allergy from becoming a shortcut that blocks upstream food-structure backtrace.

Substrate dominance and scheduling before immune labeling.

Fat Freshness Boundary and fat state instability can mimic sensitivity patterns.

Fat Processing Rate mismatch can produce digestive and skin outputs without allergy as first cause.

Sebum Processing Rate and local environment affect greasy coat and itch signals.

Consider when structure and state variables are ruled out or when clinical boundary requires it.

skin or stool output appears

↓

label as allergy

↓

stop food-structure analysis

observable output

↓

backtrace to upstream food structure and ingredient state

↓

control variables and pathways

↓

allergy branch only when boundary conditions require

Loose stool index, greasy coat and black chin index, and coat condition changes are outputs for backtrace—not automatic allergy proof.