Yes, leaving a dog alone for 9 hours is generally too long and can lead to discomfort, stress, or health issues due to prolonged urine retention and lack of stimulation.
Most healthy adult dogs can hold their bladder through the night, but puppies, seniors, and dogs with medical conditions may require nighttime bathroom breaks.
Dogs should not be left outside all day, as they need regular bathroom breaks, human interaction, mental stimulation, and protection from weather conditions.
Not walking a dog every day isn't inherently cruel, but dogs need regular bathroom breaks, mental stimulation, and exercise, which daily walks often provide.
Frequent urination in dogs—more than every four hours for adults or sudden increases in frequency—can indicate a medical issue and warrants a vet visit.