If your dog ever takes a dump and it's blue or bluish green, take them to the vet IMMEDIATELY. When my golden retriever/cocker spaniel mix dropped a blue deuce last week we thought it was pretty weird, but she wasn't behaving differently and I dismissed it.
Yesterday morning at approximately 7:30 AM we had to put our dog, Honey, to sleep. She was two years old.
Early Sunday morning the vet diagnosed her respiratory distress as kennel cough and the pressure on her organs on extreme overeating (it was possible she got into a big sack of dog food). The following day her condition rapidly deteriorated and we rushed her back to the vet. Further examination revealed massive internal bleeding putting pressure on her organs, including her lungs, and an enlarged heart resulting from poison. Somehow, somewhere, some time Honey ate rat poison. The vet asked if we had observed any strangely blue dumps and, of course, we had, but there was only one and we didn't realize what the implications could be. We began treatments, but after 24 hours her condition continued to deteriorate. We had to let her go just after dawn on Tuesday morning.
Losing a dog is always hard, but losing a dog who is two years old is devastating. We're absolutely heartbroken.