This situation in dogs may be due to the anthelmintic drug taking effect in the body. The bugs in the body will die after receiving the drug, and the dog appears to be unwell, so it seems to be excited; it may also be that the dog is not interested in repellent drugs. There is a strong reaction to insecticides, and the dog will feel unwell and may experience vomiting and diarrhea. The breeder can feed the dog more water to relieve the discomfort.