diff --git a/code/modules/mob/living/simple_animal/simple_animal.dm b/code/modules/mob/living/simple_animal/simple_animal.dm
index b192182c71..5fa6a0c22d 100644
--- a/code/modules/mob/living/simple_animal/simple_animal.dm
+++ b/code/modules/mob/living/simple_animal/simple_animal.dm
@@ -6,6 +6,7 @@
 	gender = PLURAL //placeholder
 	///How much blud it has for bloodsucking
 	blood_volume = 550
+	rad_flags = RAD_NO_CONTAMINATE
 
 	status_flags = CANPUSH