<h4>Pet Registry Module Fixes</h4><ul><li><strong>Fixed:</strong> Enabled error_reporting(E_ALL) in petregistry.controller.php — was missing entirely.</li><li><strong>Fixed:</strong> JSON parse error on getDistinctBreed — PHP warnings before JSON output. Two root causes: (1) Undefined array key "multisite" in PetRegistry.class.php line 83 — $_SESSION["multisite"] accessed without null check. Added ?? 0 fallback on both occurrences. (2) Null array offset on petregistry.controller.php line 283 — get_my_chosen_pet_type() returns null when no pet type configured, then code accessed ["registry_breed_id_fk"] on null. Added null guard.</li><li><strong>Fixed:</strong> Same null crash pattern in chosenpettype action (line 209) — explode() on null and array offset on null $item. Added null guards.</li></ul>