Please help my dog OSCAR

Hi my name is Gary and I am fundraising for one of two of the best friends I've ever had. Oscar and his brother Bubba are 3 yr old French Mastiffs or Dogue De Bordeaux brothers who're the world to me and my family. A week ago Oscar started having problems going to the bathroom. We took him to our Vet and he has Cystine Crystals in his bladder and urethra and cannot pass them and will require surgery at a cost of around $6000.00. I love my Dog's very much as most Dog owner do and Me his Big brother Bubba and the rest of his family are grateful for your support and Prayers to help bring Oscar home healthy and happy.