What about the Obama “Obey” t-shirt on the teen boy in the shed scene?
There are a few shots composed where we see his "obey" and her "nasa". Not sure what that might mean, if anything at all, but I'm certain there was purpose.
Per your animal comment, I addressed that... However, I don't have a read on the Pink Flamingos other than the Florida tropical climate encroaching on New York, so it might be more climate change insinuation.