The phrase "hyper behavior" refers to someone being extremely energetic, excited, or restless. It usually means that the person is acting more active or impulsive than usual. Full definition
It's no secret that if you feed a child sugary treats and beverages that you can expect a degree of hyper behavior and mood swings followed by a sudden crash. (myketokitchen.com)
Methylxanthine toxicity from chocolate consumption leads not only to gastrointestinal upset in dogs and cats but also hyper behavior, muscle tremors, elevated body temperature, and even possible heart arrhythmias and seizures in some pets. (prosensepet.com)
Won't my puppy grow out of her hyper behavior? (k9handler.com)