Scope: Soft and foam sleeping beds, cots, and bedding pads for dogs and cats (the retail "pet beds & bedding" leaf); excludes crates/carriers themselves (pet-carriers), standalone accessory heating pads not sold as a bed (pet-heating-pads), pet furniture like sofas/ramps/cat trees (pet-furniture-activity), litter (litters), and small-animal substrate/hideouts (aquatic-decor, cages, habitat-heating).

Seed (persona: a nurse):
1. The weave-vs-thread-count equivalent is foam/fill type over the thickness-in-inches number everyone advertises: two "6 inch thick" beds feel nothing alike if one is dense support foam and the other is fluffy fiberfill that bottoms out.
2. A nurse notices use-in-practice safety first: waterproof liner and washable cover for an incontinent or recovering pet, a non-skid base so an arthritic dog doesn't slip getting on/off, and whether a heated bed could overheat or burn a pet too immobile to move off it.

Sources:
[wiki_pet_furniture] https://en.wikipedia.org/wiki/Dog_bed (redirects to Pet furniture) — doughnut-shaped vs flat mattress-style bed forms — fetched excerpt
[kuranda_chewproof_guide] https://www.kuranda.com/indestructible-chew-proof-dog-beds-buyers-guide — aluminum frame rated 250 lbs, 40oz heavy-duty vinyl fabric, no internal stuffing to swallow, bolt-rope edge construction — fetched excerpt
[bigbarker_home] https://bigbarker.com/ — 3-layer orthopedic foam blend, vet-recommended for joint pain/mobility/post-surgery, 7in Large/Giant and 4in crate-size thickness variants — fetched excerpt
[furhaven_foam_specs] https://furhaven.com/products/extra-parts-foam-for-deluxe-mattresses-and-sofa-bed-bases — four foam types (convolute orthopedic, solid orthopedic, memory top, cooling-gel top), thickness 3in (S-L) to 5in (Jumbo Plus), gel foam cuts surface temp 1-2°F — fetched excerpt
[khpet_lectrosoft] https://www.khpet.com/products/lectro-soft-outdoor-heated-bed — thermostatic electric heating, 20W/40W/60W by size (S/M/L), MET Labs tested, exceeds USA/CA electrical safety standards, steel-wrapped cord — fetched excerpt
[khpet_thermokitty_mat] https://www.khpet.com/products/thermo-kitty-mat — 6W low-wattage heated mat, 12.5x25in — fetched excerpt
[khpet_selfwarming_pad] https://www.khpet.com/products/self-warming-pet-pad — passive reflective self-warming material, no electricity, captures/radiates pet's own body heat — fetched excerpt
[khpet_coolbed3] https://www.khpet.com/products/cool-bed-iii — water-fill cooling core, no electricity, no gel, recommended for arthritis/hip dysplasia/panting — fetched excerpt
[khpet_pet_cot] https://www.khpet.com/products/original-pet-cot — metal tubing + PVC frame, breathable mesh cover, weight limit 200 lbs (S/M/L) to 300 lbs (XL/Jumbo) — fetched excerpt
[certipur_dogbed_guide] https://certipur.us/how-to-choose-a-dog-bed/ — sizing rule (nose-to-tail length +8-10in), sleeper types curler/burrower/sprawler/leaner drive shape choice, CertiPUR-US foam certification criteria, washable cover guidance — fetched excerpt
[certipur_about] https://certipur.us/about/ — CertiPUR-US certification program covers dog/pet bed foam producers — fetched excerpt
[akc_choosing_bed] https://www.akc.org/expert-advice/home-living/choosing-right-dog-bed/ — joint support for arthritic/aging dogs, removable machine-washable cover, size-to-dog matching, den-animal comfort — fetched excerpt
[akc_heated_beds_safety] https://www.akc.org/expert-advice/home-living/heated-beds-safe-dog/ — electric/microwavable/self-warming heated bed types, chew-resistant cord, auto shutoff, non-skid bottom, overheating risk for immobile pets, vet consultation advised — fetched excerpt

Branches:
- bed_type=cushion_or_orthopedic -> ask sleeper_shape/fill_or_foam_type/foam_thickness/foam_certification/outer_cover_material/cover_removability; frame, weight-capacity, climate and crate-fit facets stop mattering. Supported by furhaven_foam_specs + bigbarker_home (foam-filled beds) vs khpet_pet_cot/kuranda_chewproof_guide (frame beds have no fill).
- bed_type=elevated_cot -> ask frame_material/elevated_weight_capacity; fill/foam facets stop mattering because cots carry no stuffing. Supported by kuranda_chewproof_guide ("not stuffed with filling").
- bed_type=climate_controlled -> ask climate_mechanism/heating_wattage/electrical_safety_certification. Supported by khpet_lectrosoft (electric) vs khpet_selfwarming_pad (passive) vs khpet_coolbed3 (water-core) being three distinct mechanisms on the same retailer.
- bed_type=crate_pad_or_mat -> ask crate_size_compatibility/foam_thickness/waterproof_backing; frame and climate facets stop mattering. Supported by bigbarker_home's separate "CrateDog" 4in line.
- primary_species=cat -> sleeper_shape skews to hooded_cave/donut; elevated_weight_capacity stops mattering (cat weight is well under any frame's rated capacity). Supported by khpet_selfwarming (cat-specific products), certipur_dogbed_guide (curler behavior).
- buyer_reason=chew_resistance -> ask chew_resistant_construction. Supported by kuranda_chewproof_guide.
- buyer_reason=joint_support -> ask foam_thickness/fill_or_foam_type, skewed to orthopedic/memory foam. Supported by bigbarker_home + akc_choosing_bed.
- buyer_reason=anxiety_calming -> ask sleeper_shape, skewed to donut_cuddler/hooded_cave. Supported by akc_choosing_bed (bolster/donut for curlers) + certipur_dogbed_guide.

Noise (spec-sheet rows left out):
- Color/pattern options (Kuranda, Big Barker, FurHaven all list many colors) — price/aesthetic, not expertise, generic test fails.
- Brand warranty length/terms (Kuranda 1-yr chew-proof warranty) — brand policy, not a product attribute.
- Exact dollar price tiers across all SKUs — price is never a facet per rule.
- Specific crate-size numbers (18/22/24/30/36/42/48in) — no single source gave the full list; crate_size_compatibility kept qualitative (matches a model vs. universal trim-to-fit vs. sold by LxW) instead of inventing breakpoints.
- Assembly/tool requirements for cots (Kuranda, K&H both mention) — one-time setup step, not an ongoing buying differentiator.

Corrections (2026-10-26):
- Promoted climate_mechanism to a 4th split with its own branches: only electric_resistive_heated triggers heating_wattage/electrical_safety_certification; self_warming_passive_reflective, cooling_water_core, and cooling_gel_foam now make both irrelevant, matching their own powerless definitions. bed_type's climate_controlled branch no longer asks those two directly.
- Scope decision: standalone heating mats/pads with no bed-shaped structure (e.g. K&H's Thermo-Kitty Mat, Igloo-style heated pad) route to the planned pet-heating-pads leaf when it is built; pet-beds' climate_controlled branch stays scoped to products K&H and others market and ship as a complete bed (Lectro-Soft bed, Cool Bed III, Self-Warming Pet Pad). Kept khpet_thermokitty_mat as a corroborating number source for heating_wattage's low end only, not as an in-scope product example.
- Added vocabulary entries for curler/burrower/sprawler/leaner (certipur_dogbed_guide names all four as the sleeper types sleeper_shape is built on).
- Added a vocabulary entry for "crate pad" and dropped foam_certification's oeko_tex_certified value — no reference or source in this register mentions OEKO-TEX.
- Clarified frame_material's listing_field_hint/backfill_note: a hybrid frame (metal tubing with plastic/PVC corner connectors, as on khpet_pet_cot) codes to the tubing material, not the connectors.
- Added vocabulary entries for "UL / ETL listed" and "Fiberfill" (used as values but previously undefined).