diff --git a/build-data/paper.at b/build-data/paper.at
index 16a94f7cf6..e3c2910ea1 100644
--- a/build-data/paper.at
+++ b/build-data/paper.at
@@ -215,3 +215,11 @@ public net.minecraft.world.entity.monster.Witch usingTime
 
 # PlayerDeathEvent#getItemsToKeep
 public net.minecraft.world.entity.player.Inventory compartments
+
+# Missing Entity API
+public net.minecraft.world.entity.animal.Fox isDefending()Z
+public net.minecraft.world.entity.animal.Fox setDefending(Z)V
+
+public net.minecraft.world.entity.animal.Fox isFaceplanted()Z
+public net.minecraft.world.entity.animal.Fox setFaceplanted(Z)V
+
diff --git a/patches/api/0320-Missing-Entity-Behavior-API.patch b/patches/api/0320-Missing-Entity-Behavior-API.patch
new file mode 100644
index 0000000000..8a426bcb12
--- /dev/null
+++ b/patches/api/0320-Missing-Entity-Behavior-API.patch
@@ -0,0 +1,73 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
+Date: Fri, 28 May 2021 21:06:59 -0400
+Subject: [PATCH] Missing Entity Behavior API
+
+
+diff --git a/src/main/java/org/bukkit/entity/Fox.java b/src/main/java/org/bukkit/entity/Fox.java
+index 498e182846b81d50b3a594254e8b341fb23e8763..3826363a1954afcddaadec7f96ac18300f8e89e9 100644
+--- a/src/main/java/org/bukkit/entity/Fox.java
++++ b/src/main/java/org/bukkit/entity/Fox.java
+@@ -85,4 +85,62 @@ public interface Fox extends Animals, Sittable {
+         RED,
+         SNOW;
+     }
++
++    // Paper start - Add more fox behavior API
++    /**
++     * Sets if the fox is interested.
++     *
++     * @param interested is interested
++     */
++    public void setInterested(boolean interested);
++
++    /**
++     * Gets if the fox is interested.
++     *
++     * @return fox is interested
++     */
++    public boolean isInterested();
++
++    /**
++     * Sets if the fox is leaping.
++     *
++     * @param leaping is leaping
++     */
++    public void setLeaping(boolean leaping);
++
++    /**
++     * Gets if the fox is leaping.
++     *
++     * @return fox is leaping
++     */
++    public boolean isLeaping();
++
++    /**
++     * Sets if the fox is defending.
++     *
++     * @param defending is defending
++     */
++    public void setDefending(boolean defending);
++
++    /**
++     * Gets if the fox is defending.
++     *
++     * @return fox is defending
++     */
++    public boolean isDefending();
++
++    /**
++     * Sets if the fox face planted.
++     *
++     * @param faceplanted face planted
++     */
++    public void setFaceplanted(boolean faceplanted);
++
++    /**
++     * Gets if the fox face planted.
++     *
++     * @return fox face planted
++     */
++    public boolean isFaceplanted();
++    // Paper end - Add more fox behavior API
+ }
diff --git a/patches/server/0718-Missing-Entity-Behavior-API.patch b/patches/server/0718-Missing-Entity-Behavior-API.patch
new file mode 100644
index 0000000000..f0819edcdc
--- /dev/null
+++ b/patches/server/0718-Missing-Entity-Behavior-API.patch
@@ -0,0 +1,56 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
+Date: Mon, 21 Jun 2021 23:56:07 -0400
+Subject: [PATCH] Missing Entity Behavior API
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftFox.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftFox.java
+index b647a5b9fdc1da61c4035d6f2cef7814033dc608..887512ec0945d71be9ab46424d92074e24cb71fb 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftFox.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftFox.java
+@@ -114,4 +114,45 @@ public class CraftFox extends CraftAnimals implements Fox {
+ 
+         this.getHandle().getEntityData().set(net.minecraft.world.entity.animal.Fox.DATA_TRUSTED_ID_1, player == null ? Optional.empty() : Optional.of(player.getUniqueId()));
+     }
++    // Paper start - Add more fox behavior API
++    @Override
++    public void setInterested(boolean interested) {
++        getHandle().setIsInterested(interested);
++    }
++
++    @Override
++    public boolean isInterested() {
++        return getHandle().isInterested();
++    }
++
++    @Override
++    public void setLeaping(boolean leaping) {
++        getHandle().setIsPouncing(leaping);
++    }
++
++    @Override
++    public boolean isLeaping() {
++        return getHandle().isPouncing();
++    }
++
++    @Override
++    public void setDefending(boolean defending) {
++        getHandle().setDefending(defending);
++    }
++
++    @Override
++    public boolean isDefending() {
++        return getHandle().isDefending();
++    }
++
++    @Override
++    public void setFaceplanted(boolean faceplanted) {
++        getHandle().setFaceplanted(faceplanted);
++    }
++
++    @Override
++    public boolean isFaceplanted() {
++        return getHandle().isFaceplanted();
++    }
++    // Paper end - Add more fox behavior API
+ }