If your dog truly hasn't gone in 3 days, I would be very concerned. However, Chihuahua's stool is very small and they have a tendency to bury it like cats. Watch your dog closely when outside, particularly after eating. If you aren't seeing any other symptoms such as bloating, belly nipping, refusal to eat or drink, or excessive drinking, or lethargy, chances are your dog is going, and you just don't see it.


