diff --git a/bee.lua b/bee.lua
index 039765e..ee4e99e 100644
--- a/bee.lua
+++ b/bee.lua
@@ -43,7 +43,8 @@ mobs:register_spawn("mobs_animal:bee", {"group:flower"}, 20, 10, 9000, 1, 31000,
 
 mobs:register_egg("mobs_animal:bee", "Bee", "mobs_bee_inv.png", 0)
 
-minetest.register_alias("mobs:bee", "mobs_animal:bee")
+-- compatibility
+mobs:alias_mob("mobs:bee", "mobs_animal:bee")
 
 -- honey
 minetest.register_craftitem(":mobs:honey", {
diff --git a/bunny.lua b/bunny.lua
index 2b25ec6..d1519a5 100644
--- a/bunny.lua
+++ b/bunny.lua
@@ -83,4 +83,5 @@ mobs:register_spawn("mobs_animal:bunny",
 
 mobs:register_egg("mobs_animal:bunny", "Bunny", "mobs_bunny_inv.png", 0)
 
-minetest.register_alias("mobs:bunny", "mobs_animal:bunny")
+-- compatibility
+mobs:alias_mob("mobs:bunny", "mobs_animal:bunny")
diff --git a/chicken.lua b/chicken.lua
index f5a58bd..716dbeb 100644
--- a/chicken.lua
+++ b/chicken.lua
@@ -80,7 +80,8 @@ mobs:register_spawn("mobs_animal:chicken",
 
 mobs:register_egg("mobs_animal:chicken", "Chicken", "mobs_chicken_inv.png", 0)
 
-minetest.register_alias("mobs:chicken", "mobs_animal:chicken")
+-- compatibility
+mobs:alias_mob("mobs:chicken", "mobs_animal:chicken")
 
 -- egg entity
 
diff --git a/cow.lua b/cow.lua
index ff3ed7c..6c43938 100644
--- a/cow.lua
+++ b/cow.lua
@@ -98,7 +98,8 @@ mobs:register_spawn("mobs_animal:cow",
 
 mobs:register_egg("mobs_animal:cow", "Cow", "default_grass.png", 1)
 
-minetest.register_alias("mobs:cow", "mobs_animal:cow")
+-- compatibility
+mobs:alias_mob("mobs:cow", "mobs_animal:cow")
 
 -- bucket of milk
 minetest.register_craftitem(":mobs:bucket_milk", {
diff --git a/kitten.lua b/kitten.lua
index 6f17cd1..cf75451 100644
--- a/kitten.lua
+++ b/kitten.lua
@@ -55,4 +55,5 @@ mobs:register_spawn("mobs_animal:kitten",
 
 mobs:register_egg("mobs_animal:kitten", "Kitten", "mobs_kitten_inv.png", 0)
 
-minetest.register_alias("mobs:kitten", "mobs_animal:kitten")
+-- compatibility
+mobs:alias_mob("mobs:kitten", "mobs_animal:kitten")
diff --git a/rat.lua b/rat.lua
index 987d219..fc9e604 100644
--- a/rat.lua
+++ b/rat.lua
@@ -41,7 +41,8 @@ mobs:register_spawn("mobs_animal:rat", {"default:stone"}, 20, 5, 15000, 2, 0)
 
 mobs:register_egg("mobs_animal:rat", "Rat", "mobs_rat_inventory.png", 0)
 
-minetest.register_alias("mobs:rat", "mobs_animal:rat")
+-- compatibility
+mobs:alias_mob("mobs:rat", "mobs_animal:rat")
 
 -- cooked rat, yummy!
 minetest.register_craftitem(":mobs:rat_cooked", {
diff --git a/sheep.lua b/sheep.lua
index b0e740f..cd2fe8d 100644
--- a/sheep.lua
+++ b/sheep.lua
@@ -170,25 +170,14 @@ for _, col in pairs(all_colours) do
 
 	mobs:register_egg("mobs_animal:sheep_"..col[1], col[2] .. " Sheep", "wool_"..col[1]..".png", 1)
 
-	minetest.register_alias("mobs:sheep_"..col[1], "mobs_animal:sheep_"..col[1])
+	-- compatibility
+	mobs:alias_mob("mobs:sheep_" .. col[1], "mobs_animal:sheep_" .. col[1])
 
 end
 
 mobs:register_spawn("mobs_animal:sheep_white",
 	{"default:dirt_with_grass", "ethereal:green_dirt"}, 20, 10, 15000, 1, 31000, true)
 
--- compatibility (item and entity)
-minetest.register_alias("mobs:sheep", "mobs:sheep_white")
 
---[[
--- replace old sheep entity with new white sheep
-minetest.register_entity("mobs:sheep", {
-
-	on_activate = function(self, staticdata, dtime_s)
-
-		self.object:remove()
-
-		minetest.add_entity(self.object:getpos(), "mobs_animal:sheep_white")
-	end
-})
-]]
+-- compatibility
+mobs:alias_mob("mobs:sheep", "mobs_animal:sheep_white")
diff --git a/warthog.lua b/warthog.lua
index 8988341..043cb42 100644
--- a/warthog.lua
+++ b/warthog.lua
@@ -58,7 +58,8 @@ mobs:register_spawn("mobs_animal:pumba",
 
 mobs:register_egg("mobs_animal:pumba", "Warthog", "wool_pink.png", 1)
 
-minetest.register_alias("mobs:pumba", "mobs_animal:pumba")
+-- compatibility
+mobs:alias_mob("mobs:pumba", "mobs_animal:pumba")
 
 -- raw porkchop
 minetest.register_craftitem(":mobs:pork_raw", {