Why Does Your 4year Old Dog Stop Tell You When It Needs to Go Pody?
There could be a medical reason that your four year old dog has not been letting you know when they need to go out. The dog could have a urinary tract infection or other illness. Do not punish them instead take them to the vet.
1 Additional Answer
If your four year old dog no longer tells you that it has to go outside to use the bathroom it could be sick and in need of veterinary care. You should take your dog in for a checkup to make sure that nothing is seriously wrong.