diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandActivate.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandActivate.kt
new file mode 100644
index 0000000..963112a
--- /dev/null
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandActivate.kt
@@ -0,0 +1,65 @@
+package com.willfp.ecopets.commands
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.command.impl.Subcommand
+import com.willfp.eco.util.StringUtils
+import com.willfp.ecopets.pets.Pets
+import com.willfp.ecopets.pets.activePet
+import com.willfp.ecopets.pets.hasPet
+import org.bukkit.command.CommandSender
+import org.bukkit.entity.Player
+import org.bukkit.util.StringUtil
+
+class CommandActivate(plugin: EcoPlugin) : Subcommand(plugin, "activate", "ecopets.command.activate", true) {
+    override fun onExecute(player: CommandSender, args: List<String>) {
+        player as Player
+
+        if (args.isEmpty()) {
+            player.sendMessage(plugin.langYml.getMessage("needs-pet"))
+            return
+        }
+
+        val id = args[0]
+
+        val pet = Pets.getByID(id)
+
+        if (pet == null || !player.hasPet(pet)) {
+            player.sendMessage(plugin.langYml.getMessage("invalid-pet"))
+            return
+        }
+
+        if (player.activePet == pet) {
+            player.sendMessage(plugin.langYml.getMessage("pet-already-active"))
+            return
+        }
+
+        player.sendMessage(
+            plugin.langYml.getMessage("activated-pet", StringUtils.FormatOption.WITHOUT_PLACEHOLDERS)
+                .replace("%pet%", pet.name)
+        )
+        player.activePet = pet
+    }
+
+    override fun tabComplete(sender: CommandSender, args: List<String>): List<String> {
+        if (sender !is Player) {
+            return emptyList()
+        }
+
+        val completions = mutableListOf<String>()
+        if (args.isEmpty()) {
+            // Currently, this case is not ever reached
+            return Pets.values().filter { sender.hasPet(it) }.map { it.id }
+        }
+
+        if (args.size == 1) {
+            StringUtil.copyPartialMatches(
+                args[1],
+                Pets.values().filter { sender.hasPet(it) }.map { it.id },
+                completions
+            )
+            return completions
+        }
+
+        return emptyList()
+    }
+}
diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandDeactivate.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandDeactivate.kt
new file mode 100644
index 0000000..43efbe8
--- /dev/null
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandDeactivate.kt
@@ -0,0 +1,26 @@
+package com.willfp.ecopets.commands
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.command.impl.Subcommand
+import com.willfp.eco.util.StringUtils
+import com.willfp.ecopets.pets.activePet
+import org.bukkit.command.CommandSender
+import org.bukkit.entity.Player
+
+class CommandDeactivate(plugin: EcoPlugin) : Subcommand(plugin, "deactivate", "ecopets.command.deactivate", true) {
+    override fun onExecute(player: CommandSender, args: List<String>) {
+        player as Player
+
+        if (player.activePet == null) {
+            player.sendMessage(plugin.langYml.getMessage("no-pet-active"))
+            return
+        }
+
+        player.sendMessage(
+            plugin.langYml.getMessage("deactivated-pet", StringUtils.FormatOption.WITHOUT_PLACEHOLDERS)
+                .replace("%pet%", player.activePet?.name ?: "")
+        )
+
+        player.activePet = null
+    }
+}
diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandPets.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandPets.kt
index ea28833..c52c611 100644
--- a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandPets.kt
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecopets/commands/CommandPets.kt
@@ -7,6 +7,11 @@ import org.bukkit.command.CommandSender
 import org.bukkit.entity.Player
 
 class CommandPets(plugin: EcoPlugin) : PluginCommand(plugin, "pets", "ecopets.command.pets", true) {
+    init {
+        this.addSubcommand(CommandActivate(plugin))
+            .addSubcommand(CommandDeactivate(plugin))
+    }
+
     override fun onExecute(player: CommandSender, args: List<String>) {
         player as Player
         PetsGUI.open(player)
diff --git a/eco-core/core-plugin/src/main/resources/lang.yml b/eco-core/core-plugin/src/main/resources/lang.yml
index 25d8370..f25af15 100644
--- a/eco-core/core-plugin/src/main/resources/lang.yml
+++ b/eco-core/core-plugin/src/main/resources/lang.yml
@@ -21,6 +21,10 @@ messages:
   gave-pet-egg: "&fSuccessfully gave %player%&f the %pet%&f pet egg!"
   cannot-spawn-pet: "&cYou already have this pet unlocked!"
   invalid-amount: "&cInvalid amount!"
+  pet-already-active: "&cYou already have this pet active!"
+  no-pet-active: "&cYou don't have a pet active!"
+  activated-pet: "&fYou have activated the %pet%&f pet!"
+  deactivated-pet: "&fYou have deactivated the %pet%&f pet!"
 
 menu:
   title: "Pets"
diff --git a/eco-core/core-plugin/src/main/resources/plugin.yml b/eco-core/core-plugin/src/main/resources/plugin.yml
index 1bc7807..8d6000d 100644
--- a/eco-core/core-plugin/src/main/resources/plugin.yml
+++ b/eco-core/core-plugin/src/main/resources/plugin.yml
@@ -52,6 +52,8 @@ permissions:
       ecopets.command.giveegg: true
       ecopets.command.givexp: true
       ecopets.command.reset: true
+      ecopets.command.activate: true
+      ecopets.command.deactivate: true
 
   ecopets.command.reload:
     description: Allows reloading the config
@@ -74,6 +76,12 @@ permissions:
   ecopets.command.reset:
     description: Allows the use of /ecopets reset.
     default: op
+  ecopets.command.activate:
+    description: Allows the use of /pets activate.
+    default: true
+  ecopets.command.deactivate:
+    description: Allows the use of /pets deactivate.
+    default: true
 
   ecopets.xpmultiplier.50percent:
     description: Gives the player 50% more skill experience