I have found your question a bit late and am sorry. I have only just come on site.
I hope you took your dog to the vet in the meantime?
5 days without a poop, when a dog is eating normally shows there is something wrong and that can't carry on. In a situation like that a vet's advice is needed.
Normally something like canned pumpkin will help, or even a few pieces of apple (de-seeded as the seeds are toxic.) Or fibre-rich food, like brown rice, and vegetables added to meat or fish. But after 5 days it's more serious. Your dog might need an enema.