+/* Increment "t"'s lifepoints to a 1/32 chance if its .satiation is positive,
+ * its lifepoints are below "t"'s type's .lifepoints, and "t"'s .command is the
+ * ID of the waiting action. On success, also decrement .satiation by by 32.
+ */
+extern void try_healing(struct Thing * t);
+
+/* Decrement "t"'s satiation and trigger a chance (dependent on over-/under-
+ * satiation value) of lifepoint decrement.
+ */
+extern void hunger(struct Thing * t);
+