My Brody had blood in his urine and also was straining to go potty, he had bladder stones and surgery followed. I would definitely take him to the vet, and have them run tests and blood work. Any type of stones are very painful. I agree with the others I would want to know what is exactly going on.     
				__________________  Dee and Lil' Louie   RIP Lil' Brody boy 6.7.99 - 1.3.10       |