Can you check if a object is inside a certain folder?

I made this ball that you can throw and I wanna code that if it touches something it will check if its an animal that touched it, Every animal will be inside an Animals folder, but I wrote a small code and it doesn't work, I researched for 30 minutes and got no result, I also have no errors, Can anyone help me?

Here's my code

local tool = script.Parent
local debris = game:GetService("Debris")
local cooldown = false
local cooldownTime = 5
local ballRemoveTime = 4
local player = game:GetService("Players").LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()

tool.Activated:Connect(function()
	if cooldown == false then
		cooldown = true
		local cloneBall = tool:FindFirstChild("Handle"):Clone()
		cloneBall.CanCollide = true
		cloneBall.Name = player.Name.."'s ball"
		cloneBall.Parent = workspace:FindFirstChild("ClonedBalls")

		local bodyVelocity = Instance.new("BodyVelocity")
		bodyVelocity.MaxForce = Vector3.new(5,0,0)
		bodyVelocity.Velocity = (char:FindFirstChild("HumanoidRootPart").Position) * 5
		bodyVelocity.Parent = cloneBall
		
		debris:AddItem(cloneBall, ballRemoveTime)
		
		cloneBall.Touched:Connect(function(hit)
			if hit.Parent:IsA("Part") or hit.Parent:IsA("MeshPart") then
				local folder = hit.Parent.Parent:FindFirstAncestorWhichIsA("Folder")
				
				if folder then
					if folder:FindFirstChild(hit.Parent) then
						print("Touched!")
					end
				end
				
			end
		end)
		
		wait(cooldownTime)
		
		cooldown = false
		
	end
	
end)

You can use Instance:FindFirstAncestor() and pass the name of the folder into the function to see if the instance is a child of the folder.