Share Spell

[Shin Okada]

I am wondering if this ability is applied only to true spells cast by the master, or also applied to spells from scrolls or other items. Are there any official comment on this?

 

[CrimsonTemplar]

I am wondering if this ability is applied only to true spells cast by the master, or also applied to spells from scrolls or other items. Are there any official comment on this?

From the SRD:

Share Spells: At the paladin's option, she may have any spell (but not any spell-like ability) she casts on herself also affect her mount.
The mount must be within 5 feet at the time of casting to receive the benefit. If the spell or effect has a duration other than instantaneous, it stops affecting the mount if it moves farther than 5 feet away and will not affect the mount again even if it returns to the paladin before the duration expires. Additionally, the paladin may cast a spell with a target of “You” on her mount (as a touch range spell) instead of on herself. A paladin and her mount can share spells even if the spells normally do not affect creatures of the mount's type (magical beast).

Based on that I would imagine that any spell that caster casts on herself can also affect her familar/mount/animal companion if she chooses to do so, whether it be from a wand, scroll, staff, etc (remember that spell like abilities don't allow you to share).