Dogs not eating may be caused by picky eaters, overheating, illness, etc. Check whether the dog has other illnesses, feed the dog some probiotics to help regulate the gastrointestinal tract, promote digestion, and allow the dog to eat an appropriate amount Exercise to speed up metabolism. You should feed your dog less snacks at ordinary times to prevent your dog from developing picky eating habits. When the weather is hot, you should help your dog cool down to avoid heatstroke.