Do Spell-Like Abilities Require Concentration Checks?

Question

I was wondering, for spell-like abilities, do you need to make concentration checks to cast defensively, if damaged while casting, etc? Or is none of that necessary, since they technically aren't spells?

Answer 1

Spell-Like Abilities are outlined in the Universal Monster Rules section

It is possible to attempt a concentration check to use a spell-like ability defensively and avoid provoking attacks of opportunity, just as when casting a spell. A spell-like ability can be disrupted just as a spell can be. Spell-like abilities cannot be used to counterspell, nor can they be counterspelled.