[Paladin2]

"No Trespassing"

"Beware of Dogs"

"Trespassers will be shot..."

[RebelTex]

You left off the most effective one.

Your sign(s):
“No Trespassing”
“Beware of Dogs”
“Trespassers will be shot...”

Add: “Survivors will be shot again.”

;>)

[Salamander]

I cannot overstate the effectiveness of this being posted on the front of my house.

[ridesthemiles]

“No Trespassing”

“Beware of Dogs””

Those who survive the dogs will be shot.