diff --git a/game.js b/game.js
index 18528bf..b44c34c 100644
--- a/game.js
+++ b/game.js
@@ -234,8 +234,8 @@ function doDigest(containerName)
 
   var digested = container.sum();
 
-  for (var key in victims[digestType]) {
-    if (victims[containerName].hasOwnProperty(key)) {
+  for (var key in victims[containerName]) {
+    if (victims[containerName].hasOwnProperty(key) && digested.hasOwnProperty(key) ) {
       victims["digested"][key] += digested[key];
       victims["stomach"][key] -= digested[key];
     }