A video of a loyal Doberman protecting her human baby sister after she figured out how to open the door is making everyone smile. The adorable clip has had more than 13 million views on TikTok and has everyone wondering what we did to deserve dogs. Loyal Doberman protects babyIn the viral video, the black and brown Doberman is lying happily in her bed minding her own business as a baby crawls along the floor. As the little one nears the back door which is slightly ajar, the dog starts staring intently, clearly concerned about her human sister. The young baby figures out how to push open the do…