What is the reason for the purple tongue of the dog

Observe the dog’s physical condition, if everything is normal in terms of spirit, diet and behavior, then don’t worry too much, some dogs are born with a purple tongue. If the dog’s tongue suddenly turns purple, along with mental depression and diarrhea, then it may be caused by poisoning or heart disease, in addition to when the dog is deprived of oxygen, its tongue may also turn purple. Once the dog is found to be abnormal, it is best to take it to the vet immediately to receive professional diagnosis and treatment so that the dog can recover as soon as possible.