Ultimate buffer

[Indivar]

So I started a cleric in PFS, and she has the community and animal domains. I plan on taking the boon companion feat, but want to get the animal at the same time (4th level cleric, 5th level character). Thus i need 1 level of something else - whats a good choice to help create a killer support character? I was thinking bard? Other feat choices along the way are cool too (i have extra channel and selective channel)

[Lastoth]

Cleric, then just don't call the companion until 5th.

Seriously, the best thing you can add to a third level of cleric if you're concerned about support is another level of cleric.

[Mort the Cleverly Named]

If you are dropping a level on Bard, you might as well consider the Evangelist archetype. All the fun of Bardic Performance, none of the fuss. Otherwise... just don't take the familiar for a level? Honestly, there is very little reason to ditch a full casting class for something else just because you don't want the companion yet. Just avoid using the class feature for a level and you are in the exact same boat, but with better mechanical efficiency.

[Thalin]

You're going to be a better support character staying as cleric; there's no 1 level splash that is particularly amazing for it. Call the companion as a scout for 4th-5th (think bird), then get boon companion @ 5 for your long-term companion. And I agree with the "Evangalist > Cleric + Bard".