Blood in the dog’s urine during oestrus This condition occurs mostly in male dogs as young as 6 months old and the symptoms of blood in the urine are rare. Dogs generally start to come into heat at around 6 months of age and males may bleed in small amounts when in heat, creating the illusion of blood in the urine when the blood is mixed in. You can pay attention to hygiene and wear physiological trousers for your pet.
