Can change in dog food cause blood urine?

A change in dog food can cause blood in urine if the new food contains ingredients that the dog is allergic to or intolerant to. Allergic reactions can cause inflammation and irritation of the bladder and urethra, which can lead to bleeding. Similarly, if a dog is intolerant of a certain ingredient, such as a specific type of protein or grain, it can cause similar symptoms. Additionally, some dog foods may contain contaminants or toxins that can irritate the urinary tract and cause bleeding. If you notice blood in your dog's urine after changing their food, it is important to stop feeding them the new food and consult with your veterinarian to determine the cause and get appropriate treatment.