100% disagree with the statement about Petfinder. We include the question "how did you find our organization" on our adoption applications (and foster and volunteer applications) and at least as many people find us through Petfinder as they do social media (Instagram, Twitter, and Facebook combined!).
Petfinder also is included in the "ads" algorithm with Facebook, which your organization isn't paying for (I see random Petfinder ads for specific animals in my area on my Facebook feed all the time, haha).
We have our Petfinder linked to our website, so we add the animal on Petfinder and they automatically show on our website. And we link our Instagram with Facebook and Twitter, so you can share those posts directly as well (wider range with less effort). I don't recommend sharing every Instagram post to the others, as I think it's helpful to use the different mediums in different ways, but in a pinch - that's better than nothing!
#AdoptionsandAdoptionPrograms