In your case, it's easy to recover. Feed the dog something easy to digest, such as yogurt or nutritious fast bread.
You can drink some broth, remember to supplement calcium and get more sunshine.
Be sure to walk more and play with dogs. If you are tired, you will be hungry. Eat more. Only by eating more can we grow faster.
Don't feed the dog food for the time being, but feed it regularly, not too much and not spicy. My Samo liked to cook instant noodles at that time, hehe. Many dogs lose their appetite after eating pesticides. A little conditioning, feed steamed bread, let the dog chew bones and digest everything.