My beautiful and loving Wheaten Terrier dog Cosmo passed away on Friday, November 4, 2016 at 14 + years. When he was 13 + in March of 2016 he developed cysts on his eyelids and the Vet said he was strong enough to have them removed. I agreed because they know better than I do. The operation was a success until a week later Cosmo started to dehydrate with vomit and diarrhea. We took him back to the Vet and they hospitalized him. Long story short, once he came home it happened again and was hospitalized. His head was twitching and he was losing control of his back legs. It also appeared as if he didn't know where he was going on our daily walks. They didn't know what was wrong with my Cosmo. I took him back to his original Vet who knew him since he was born. She immediately diagnosed him as have a brain tumor. The brain tumor could not be verified because that would involve anesthesia which she felt caused his dehydration from the operation. My Vet kept my Cosmo alive with prednisone and anti-seizure medication. My Vet saved Cosmo for 8 more months until I noticed he wasn't breathing well, wheezing and sounded like he was struggling for air (Vet suspected Larpar), going blind, couldn't hear me like he used to, couldn't go up the stairs without stumbling, stumbling on our walks, walking in circles as if lost, and just laying around. He struggled to stand and to sit so he just crashed onto the floor to lay. He was restless at night and when the slight moaning started I brought him back to the Vet. On Friday, November 4, 2016 my Vet informed me that it was "Cosmo's time" - I was shocked and stupid. I agreed to euthanization. I did not want my Cosmo to suffer anymore, but the experience was horrible. When I brought Cosmo into the room, he immediately panicked and started scratching at the door to get out. He was frantic and banged his head on the examining table. When the Vet tried giving him the needle to open his veins she somehow missed and Cosmo cried out in pain. Finally the injection was given and the Vet told me to walk him around outside in the sunshine and when he starts to lose his balance (which should be in 10 minutes) to bring him back in . Well it only took 3 minutes and he was collapsing and falling over. I rushed him back into the office almost dragging him. We laid him on the table and she injected him with the final medication and he was gone. I am heartbroken. I tried to give my dog some dignity in dying which he deserved only to be tortured with the horrible thought of how he left us....scared and panicked. He didn't deserve it. He deserved a peaceful death. He was a wonderful and loving dog. I am haunted by his last minutes and pray everyday since that he forgives me.