Axolotls rapidly twitch when attached to leads

The Bug:

Axolotls rapidly twitch when attached to leads.

Steps to Reproduce:

1. Summon an axolotl and obtain a lead.
2. Attach the lead to the axolotl.
3. Observe the axolotl's behavior for a while.
4. Take note as to whether or not axolotls rapidly twitch when attached to leads.

Observed Behavior:

Axolotls rapidly twitch.

Expected Behavior:

Axolotls would not rapidly twitch.