Pig ears are perfectly fine, but do watch your supplier. They are not fatty. The oil on them is because cheaper brands don't cut off the drums.
I get mine from Nothing Added. They are a local Canadian company, but will be shipping to the US soon. All locally sourced ingredients, human grade, nothing from China. They are simply dehydrated, no preservatives, additives or flavouring added.
Check your supplier, but they are perfectly fine for a snack, my dog loves them too, although she doesn't get nearly as worked up as your pup does!