Insect-based ingredients also face regulatory hurdles.  However, those barriers may be falling away.  

Insect-based pet food ingredients may face regulatory and psychological hurdles until they are fully accepted into the US market.  However, other cultures have no qualms about entomophagy (the consumption of insects) for humans or animals.  That attitude seems to be creeping into the US and Europe, while legislative blocks to bugs are being squashed.  Read more here.

Wall, Tim. “Insects as Pet Food Ingredients Overcoming Barriers in US.” PetfoodIndustry.com, 23 Mar. 2018, http://www.petfoodindustry.com/articles/7061-insects-as-pet-food-ingredients-overcoming-barriers-in-us.