2.9 Symptoms Are Not Isolated

Skin, coat, loose stool, constipation, hairball vomiting, urinary concentration, and obesity are not an isolated symptom list. They are output signals from the same metabolic operating system at different exits.

Conventional framing splits them: loose stool to “gut,” constipation to drinking, urinary signs to water intake, greasy coat to cleaning, coat change to vitamins, obesity to calories.

Feline FBM backtraces shared upstream: food structure → Primary Energy Substrate → Insulin Regulation State → digestion and transport → water recovery → Solute Load per Unit Energy → sebum system → observable outputs.

Determines substrate entry, energy density, fat state, protein role, and solute load.

Glucose-dominated scheduling, fatty-acid-primary scheduling, and protein energy pressure generate different output patterns.

Insulin scheduling affects energy allocation and fatty acid pathway occupancy.

Gastric residence, Fat Processing Rate, and small-intestinal absorption link loose stool, reflux, and hairball pathways.

Proximal small-intestinal recovery, SGLT1-mediated handling, and colonic motility shape stool water content.

Renal processing pressure shapes urinary concentration outputs.

symptom appears

↓

assigned to local organ problem

↓

local fix without structure backtrace

observable output

↓

corresponding system

↓

control variables

↓

food structure

↓

feline carnivorous metabolic premise

loose stool → stool water content → fat processing rate / colonic handling → food structure

urinary concentration → renal load → solute load per unit energy → substrate and protein energy pressure

greasy coat → sebum processing → energy scheduling and fat state → food structure

Outputs are entry points, not root causes.

Loose stool, constipation, hairball vomiting, greasy coat or chin presentation, urinary concentration, and obesity each map to a system path—but they are not independent diagnoses.

When multiple outputs appear or shift over time, Feline FBM reads them as correlated signals from shared upstream structure, not as unrelated problems requiring unrelated default explanations.