Each calculator runs on numbers from the systematic review corpus. The thresholds are cited, the math is shown, and every result links back to the source review. Use them as a second pair of eyes on a feeding decision, not as a replacement for your veterinarian.
Enter your forage test results: NSC, ESC, WSC, starch. Get a plain-English interpretation, a PSSM-suitability verdict, and an action list if any value is over the safe threshold.
Open calculator →Enter horse weight, work level, and diagnosis (PSSM Type 1, PSSM Type 2/MFM, RER, or general low-NSC). Get target totals for daily intake, the sugar-and-starch ceiling, fat percentage, protein, and key supplements.
Build a ration →Every review, condition, symptom, treatment, and diagnostic in one interactive map. Click any node to see what it links to, search any term, and trace how the 34 reviews connect to each other and to the diseases they describe.
Explore the graph →Every PSSM-relevant commercial feed in one filterable table. Filter by NSC ceiling, fat, protein, price, brand, category, or region. Sort any column. Download the data as CSV or JSON.
Compare feeds →Available tools are live and free to use. Roadmap tools are scheduled for build-out from the corpus and will ship with the same citation transparency. Hover or tap any source-review number to see what evidence drives the tool.
| Tool | What it does | Inputs needed | Source reviews | Status | |
|---|---|---|---|---|---|
| Hay NSC Calculator PSSM-safe verdict on a hay test | Reads a forage analysis and tells you whether the hay is safe for a PSSM horse. Flags which fraction (ESC, WSC, total NSC, starch) drove the verdict. | Forage test results: NSC %, ESC %, WSC %, starch %. | 02, 07, 08, 09 | Live | Open → |
| Daily Ration Builder Disease-specific feeding targets | Builds a daily ration with target ranges for total intake, sugar-and-starch ceiling, fat percentage, protein, vitamin E, and selenium based on the diagnosis. | Body weight, work level, diagnosis (PSSM1, PSSM2/MFM, RER, low-NSC). | 01, 02, 03, 16, 17 | Live | Open → |
| Knowledge Graph Connect every review, every concept | Interactive force-directed map of the corpus. Reviews, conditions (PSSM, EPM, RER, MFM), symptoms, treatments, diagnostics, and nutrients linked by what relates to what. Click, search, filter. | Nothing. Click any node to start. | all 34 | Live | Open → |
| Feed Comparison Filterable commercial feed database | Side-by-side comparison of every PSSM-relevant commercial feed in the corpus. Filter by NSC, fat, protein, price, brand, category, region. Sort any column. Download the dataset as CSV or JSON. | Nothing. Browse, filter, or hit a preset. | 18, 31 | Live | Open → |
| Supplement Stack Checker Avoid duplicates and imbalances | Add the supplements you're already feeding and see daily totals for vitamin E, selenium, copper, zinc, iron, magnesium, omega-3, and lysine. Flags duplicate vitamin E, selenium overdose risk, Cu:Zn imbalance, and synthetic-vs-natural form errors. | Body weight, management goal, brand and servings of each supplement. | 13, 15, 19, 23 | Live | Open → |
| Cost-of-Care Projector 5-year financial forecast | Projects five-year direct and indirect costs of managing a PSSM or EPM horse across severity tiers, with cost-effectiveness comparison of dietary intervention versus standard care. | Diagnosis, severity tier, region (US, UK, EU, AU), insurance status. | 30, 32 | Coming soon | Q3 2026 |
| Genetic Test Decision Wizard Which test, which lab, what next | Walks owners through whether to order the GYS1 R309H test, which laboratory to use, what carrier-frequency to expect for the breed, and what the result means for breeding decisions. | Breed, clinical signs, breeding plan. | 04, 28 | Coming soon | Q4 2026 |
| EPM Differential Diagnosis Tree Rule-out before you treat | Interactive walk-through of the EPM differential: cervical vertebral compressive myelopathy, EHV-1 myeloencephalopathy, equine motor neuron disease, Lyme neuroborreliosis. Returns likelihood ratios and recommended next tests. | Neurologic exam grade, paired serum/CSF results, presenting signs. | 12, 22, 25, 27 | Coming soon | Q4 2026 |
| Episode Log + Trend Tracker Catch a failing diet early | Owner-facing log for tying-up episodes, monitoring labs (CK, AST, vitamin E), and ration changes. Plots multi-month trends so a failing protocol shows up before the next episode. | Episode dates, lab results, ration changes (entered over time). | 10, 24 | In research | Q1 2027 |
All tools are reference aids. They are not a substitute for veterinary diagnosis or individualized clinical advice. Every output cites its source reviews so you can verify the underlying evidence and bring it to your veterinarian.