There are parasites in dogs, and everything they eat is absorbed by parasites. Dogs can't absorb nutrients, so they naturally lose weight. Without nutrition, the dog's body resistance drops, and trembling is normal. If the dog doesn't have an insect repellent, go to Pet E to buy a pet insect repellent, and then if the insect repellent is kept, it will be a gastrointestinal problem.
Poor digestion and absorption of dogs' intestines and stomach will easily lead to poor growth of dogs, and the things and nutrients they eat will not be digested. As feces are eliminated from the body, there is naturally no motivation to gain weight.
Therefore, in this case, you must first buy a favorite probiotic to regulate his stomach and help the dog digest and absorb. Only when dogs digest and absorb can they grow better.
As long as the cause is found, symptomatic treatment is easy to adjust.