Youtube is currently unblocked =) Thank God.

Where in Shenzhen will you be located? Downtown or in the outer districts? (It makes a huge difference to what you can easily find and experience)

Undergarments for women are not so hard to find – for men, well the selection is just not so great and you better bring enough from home that you’re comfortable with.

Dogs? What do you mean? There are vets and pet shops here, where you can get decent (average) food, and shots and the like, you just need to be sure you are going to the vet with a good reputation (which can be hard to find out if you don’t read Chinese or have a decent network going in)

Meds – that depends on what you need. Of course, you’ll need to go to the doctor to get prescriptions for most things that would need a prescription in the States (although some things, like antibiotics, you can get in a drugstore without a prescription) – and I’m not sure on the availability of all meds…