My heart just simply breaks everytime I think of you and Tango.
But it brought back a memory of a dog I saw when Anna, Phred and I went to a Bark in the Park. This owner had a dog in a cart, and he lifted her down to the water so she could swim. He had told Phred that she had always been a strong active dog and one day after a run in the park she came home and the next day when he went to take her out she did what Tango did, she couldn't walk or move. I don't remember if she had surgery but they had put her in a cart and he said she acted like nothing was wrong.