Trying to make a "Meat processing machine". What's the issue here?

Excuse the silly commentary, but I'm hoping it'll help you figure out what exactly it is I'm trying to do. I'm working on the same game I was 4 years ago, "Eaten by Cats", and I need a brick to change color when it touches the parent of this script but it refuses. The script doesn't seem to be throwing any errors of any kind, even when I enable debug.

function onTouched(Meat)                        --Eww, something touched me!! I'm gonna call it "Meat".
    local oldmesh = Meat:FindFirstChild("Mesh") --Was it something with a Mesh?
        if oldmesh ~= nil then                  --WAS IT???
            oldmesh:Remove()                    --EWW IT'S LUMPY REMOVE THE MESH
        end
    local Decal = Meat:FindFirstChild("Decal")  --Is there a Decal here?
    if Decal ~= nil then                    --Just in case there is...
    Decal:Remove()                          --KILL IT.
    local Decal = Meat:FindFirstChild("Decal")  --Is there a Decal here?
    end 

    local Humanoid = Meat.Parent:FindFirstChild("Humanoid")
    if Humanoid ~= nil then
        Humanoid.Health = 0
    end
    if Meat.Name ~= "Head" then                 --AAH, A HEAD!!
        Meat.Name = "Food2"                     --I shall throw it away, and feed the rest of the body to my children.
    end
    Meat.Material = "Granite"                   --Granite looks a bit like meat, why not?
    Meat.Cancollide = true                      --Arms won't fall through the ground.
    Meat.BrickColor = Color3.fromRGB(255,148,148)       --Medium rare mutton color.
end 
script.Parent.Touched:connect(onTouched)        --This tells onTouched() to happen when it's touched.

--Script by SethPaw