He may be. If nothing else have a urinalysis done to rule out a urinary tract infection and a stool check done to rule out worms. Both of these are not too expensive and treatment is not expensive either. Is he on heartworm preventative? If not, then this could be end stage heartworm disease. He may be having prostate problems with the blood in his urine. There are a lot of possibilities. The urinalysis will also give a good indication as to if he may be in kidney failure.
__________________
If my answer was helpful please click the green accept button My answer should not take the place of a Vet's diagnosis when needed. Positive feedback is most welcome and a bonus-though not required-is greatly appreciated no matter how small.

