Roman the Mastiff needs your help

Roman the English Mastiff is a companion pet for his owners Autistic 10yr old son, who recently started having seizures. As well as being an emotional support friend and brother during this COVID 19 pandemic Normally playful but recently have received bad news. He has bladder stones, partially blocked urethra, distended bladder, crystals in urine and a stone wedged that’s blocking ability to urinate. Roman is in urgent need of surgery. And anything you can offer would be greatly appreciated