Miranda Lambert is mourning the loss of her canine companion, and paying tribute with some touching snapshots.The country singer took to Instagram on Tuesday to share the news of her dog's death, and to express her heartbreak over the loss.«May 1, 2016 I adopted 2 beautiful Great Pyrenees named Thelma and Louise to watch over one of my happiest places on earth. My farm outside of Nashville,» Lambert wrote in her memorial post, alongside a number of photos showing her adorable pup.