Our 2 yr old zu has been scratching heavily for the last 2 weeks. Any suggestions?

Have you checked her for fleas? What type of food are you feeding? Are you in a climate with biting bugs? You can try an dog specific oatmeal bath, or a good brushing to get rid of loose hair.

No fleas, we feed her dry dog food. I walk her twice a day so she could get bit. I'll try an oatmeal bath. We brush her regularly.

Thanks

Take her to the vet - it could be allergies.