You should never give any medicine to your dog without first speaking to your vet. This is especially true if your pet has been taking a particular medication regularly, such as Miralax. If you notice changes in your dog’s behavior after starting this medication, or they become lethargic or seem unwell in general, you should consult your vet right away. If your pet suffers from severe diarrhea, your vet may prescribe an antibiotic to kill off the bacteria causing the infection. Your vet will also likely recommend feeding your dog special food, which is high in fiber content, to help keep their digestive system functioning properly. You can find a list of foods that contain high amounts of fiber here. Constipation can also have dangerous consequences for your dog. In severe cases, a blockage could cause your dog to suffer from pain, vomiting, bleeding, and even death. It’s important to get your pet checked out at a veterinary clinic if you suspect they might be experiencing symptoms of constipation. Here are some signs your dog may need to visit the vet: Your dog isn’t acting normal Your dog appears uncomfortable while lying down Your dog seems to hold onto their poop more than usual Your dog shows signs of discomfort when defecating Your dog doesn’t drink water as often as usual Your dog’s poop is dry and hard to remove