I want to ask, my dog is one year older than the bear, and takes a bath every two weeks, but it often itches badly. What happened?

But I didn't see a pet hospital in Chongqing to do scraping. The last time I went to the doctor, I didn't check it.

Since May 28th, when our dog shaved his hair, he stood up and slept without eating, his tail and hind legs kept shaking, and immediately stood up and continued to doze off when he fell asleep. Seeing him like that really makes people laugh and cry. Before shaving, eat a bowl of rice and meat and dog food every day. Now I don't eat a grain of rice every day, only 20-30 pieces of dog food. I wonder if it is hungry. How can it change so much? I really can't accept it. This is a strange dog. I haven't eaten or slept well for so many days, and I'm worried about its health. Now I can feel the bones on my back. (I am the questioner)

Thank you very much for your answers.