Animal to Human (Witch)
The witch is able to polymorph her familiar into the witch’s race once per day.
Liber Mysterium
The Netbook of Witches and Warlocks
By Timothy S. Brannan and The Netbook of Witches and Warlocks Team
Full netbook can be found on the followng website
Prerequisite: a familiar.
Benefit: The caster can polymorph her familiar (as the spell polymorph other, except that the spell lasts until the caster chooses to dispel it.) into a member of witch’s race. The caster cannot change the sex of the familiar. The familiar has the ability to speak in this form. However, the familiar retains its original hit points and saving throws, and may not engage in strenuous situations (such as heavy lifting, running, spell casting, or combat). If the familiar attempts this, she will revert to her original form.
In this form, the witch gains an additional +5 to her Disguise checks. This stacks with the +10 bonus to Disguise that the initial polymorph would also grant.