local QuestId_Cluck = 3861
local NpcChicken = 620
local GobIdFarmChickenEgg = 161513

function OnQuestReward(event, player, creature, quest)
    -- Quest: Cluck!
    if (quest:GetId() == QuestId_Cluck) then
        -- spawn the cleansed plant
        local x, y = creature:GetRelativePoint(math.random()*9, math.random()*math.pi*2);
        local z = creature:GetMap():GetHeight(x, y) or creature:GetZ()
        creature:SummonGameObject(GobIdFarmChickenEgg, x, y, z, 0, 30);
    end
end

RegisterCreatureEvent(NpcChicken, 34, OnQuestReward) -- 34 for creature OnQuestReward event