That was Nuts!Daggett the Beaver
Daggett Doofus Beaver (usually nicknamed as "Dag" and "Daggy"), also known as Daggett the Beaver, is the younger twin brother of Norbert Beaver (by four minutes), and the titular main protagonist of The Angry Beavers.
He was voiced by Richard Steven Horvitz who also voiced Zim from Invader Zim, Billy from The Grim Adventures of Billy & Mandy, Grey Matter from Ben 10, Lugosi from Bunnicula, and Alphas 5 & 7 from Mighty Morphin Power Rangers.
Dag is a normal American beaver with brown fur, fin like ears, razor sharp teeth, a gray tail, a black monobrow, and a red nose. He was always a few inches taller than his older twin, but he omits that fact so his brother doesn't feel bad.
Hyperactive and immature, Daggett has a habit of over-emphasized and manic motions as well as a potent penchant for name-calling. He shares with his brother a typical brotherly love-hate relationship, supporting and antagonizing his elder sibling as his mood requires. While he is occasionally capable of intellectual competence, he is generally overshadowed by his brother when faced with challenges that require mental capacity. He is, however, a very hard worker and is quite skilled at construction.