Help with Mouse.Target only working in a friends game but not mine ;( ?

This is in a local script and the thing that is weird is that.. This script is working my a friends game but not mine, everything is exactly the same!

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local Cow = game.Workspace.Cow

Mouse.Button1Down:connect (function()
	if Mouse.Target.Name == 'Cow' then
		for i,v in pairs(Cow:GetChildren()) do
	   	if v:FindFirstChild('Fire') then
				v:FindFirstChild('Fire'):remove()
			end
		end
	end
end)