From D&D Wiki
|This material is published under the OGL 1.0a|
You can summon monsters more often each day.
Prerequisites: Ability to cast summon monster as a spell-like ability, summoner 1st.
Benefit: You gain 1 additional use of your summon monster spell-like ability per day.
Special: You can take this feat multiple times, but it can only be taken once for every five summoner levels you possess.