[SDPhantom]

local AddOnPath=("Interface\\AddOns\\%s\\"):format(...);--  Dynamically fetch our addon path
local EventFrame=CreateFrame("Frame");
 
EventFrame:RegisterEvent("PLAYER_LOGIN");
EventFrame:RegisterUnitEvent("UNIT_PET","player");
EventFrame:RegisterUnitEvent("UNIT_HEALTH","pet");
 
local LowHealthThreshold=0.35;
local LastHealthValue=0;
EventFrame:SetScript("OnEvent",function(self)
    if UnitExists("pet") then-- Check if pet exists
        local cur,max=UnitHealth("pet"),UnitHealthMax("pet");
        if cur and max and max>0 then-- Check if we have health data
            if cur<=0 and LastHealthValue>0 then--  Is pet dead?
                PlaySoundFile(AddOnPath.."Res\\PHA.ogg");
            elseif cur/max<=LowHealthThreshold and LastHealthValue/max>LowHealthThreshold then--    Is pet low health?
                PlaySoundFile(AddOnPath.."Res\\PHA.ogg");
            end
 
            LastHealthValue=cur;--  Update tracking value
        else LastHealthValue=0; end--   Reset to zero if health not available yet
    else LastHealthValue=0; end--   Reset to zero if no pet
end)