Merge pull request #12441 from xxalpha/swiss_cheese

Adds a very small chance of mice chewing power cables.

code/modules/mob/living/simple_animal/friendly/mouse.dm

@@ -23,6 +23,7 @@
 	mob_size = MOB_SIZE_TINY
 	var/body_color //brown, gray and white, leave blank for random
 	gold_core_spawnable = 2
+	var/chew_probability = 1
 
 /mob/living/simple_animal/mouse/New()
 	..()
@@ -38,11 +39,14 @@
 	src.icon_dead = "mouse_[body_color]_splat"
 	death()
 
-/mob/living/simple_animal/mouse/death(gibbed)
+/mob/living/simple_animal/mouse/death(gibbed, toast)
 	if(!ckey)
 		..(1)
 		var/obj/item/trash/deadmouse/M = new(src.loc)
 		M.icon_state = icon_dead
+		if(toast)
+			M.color = "#3A3A3A"
+			M.desc = "It's toast."
 		qdel(src)
 	else
 		..(gibbed)
@@ -55,6 +59,21 @@
 			playsound(src, 'sound/effects/mousesqueek.ogg', 100, 1)
 	..()
 
+/mob/living/simple_animal/mouse/handle_automated_action()
+	if(prob(chew_probability))
+		var/turf/simulated/floor/F = get_turf(src)
+		if(istype(F) && !F.intact)
+			var/obj/structure/cable/C = locate() in F
+			if(C && prob(15))
+				if(C.avail())
+					visible_message("<span class='warning'>[src] chews through the [C]. It's toast!</span>")
+					playsound(src, 'sound/effects/sparks2.ogg', 100, 1)
+					C.Deconstruct()
+					death(toast=1)
+				else
+					C.Deconstruct()
+					visible_message("<span class='warning'>[src] chews through the [C].</span>")
+
 /*
  * Mouse types
  */