This morning Enzo woke up fine and went normal on his first walk. In the mornings he is usually bouncing off the walls when we get back. I got his breakfast ready and nothing he was just laying there. He had no interest in his food. About 2 hours later my fiance walked him before taking him to work with him. Enzo had diarrhea. We haven't changed anything in his diet nothing out of the ordinary unless he managed to find something in the micro second we didn't notice. All day he was lethargic and not interested in food and very little water. Once his dinner time came he ate, drank and was running around like nothing. We thought we had saved a trip to the vet. But Enzo has not pooped yet after eating dinner and running around. It's been about 4 hours he usually goes in 2 hours after meals. When we take him out he doesn't even seem to try. Looks like we will be at the vet first thing in the morning. Has anyone gone through this before?