The key analysis of the reasons:
Stress reaction, that is, the discomfort of the newly arrived puppy in a strange environment, is often accompanied by persistent diarrhea, listlessness and other symptoms. Due to the sales of unscrupulous merchants, dogs who are already sick (including malignant infectious diseases) are given drugs such as stimulants, which makes dogs look like normal and healthy dogs, which is also commonly known as' Zhou dogs'.
Judgment method:
Look at the coat color first. Healthy puppies generally have clean fur, smooth but not anti-fur, shiny and tight back hair and smooth and elastic skin.
Second, look at the nose. A healthy puppy's nose is moist and smooth, and it will feel cold when touched by hand. If the nose is dry, there are purulent secretions around it, or the nasal mucosa is congested and ruptured, it means that the puppy is ill. The nose of a healthy dog is moist, black and shiny. If you find that your dog has a nosebleed, nosebleed, stuffy nose, or swollen and cracked nose, it may have a cold and rhinitis.