User blog comment:CartoonEverything/Theories - Every Loud Sibling has Mental Disorders!/@comment-31563773-20170612050715

Aside from Lucy having some form of depression, I think Leni is the one who has ADHD because she has issues following conversations at times, along with her constant inattentiveness. I still think Lisa is actually Autistic, and I think Lola just has a big ego more than anything else.

As for the other kids, I honestly think they DO NOT have some sort of disability and are just regular kids who are heavily invested in their hobbies. Also, why would you think Luan has ADHD? She clearly doesn't exhibit the signs of having it.