Depict a vibrant birthday-themed cartoon where an adult Rottweiler mix dog takes center stage. The dog, with its robust normal build and a striking black coat with tan accents, has gentle brown eyes full of delight. The dog is wearing a dainty party hat. The background teems with festive energy, adorned with artfully draped streamers, a pile of colorfully wrapped presents, and a whimsical banner flying overhead that proclaims 'Happy Birthday'.

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