Dogs without teeth for more than 50 days may be different. First of all, the reason why dogs may delay teething is racial factors, because some breeds of dogs have a certain delay at this stage. Secondly, dogs may have oral problems or other health problems, which affect the growth of new teeth. If the dog has no teeth for more than 50 days, the owner should take it to the pet doctor for examination to determine its health status and what measures should be taken.