What kind of dog is this?

to me it looks like a german shepherd puppy

It's a 罗威, rottweiler, 罗威纳犬 puppy.

if 你 had showed e the tail i would have 更多 information but to my guess its a Tibetan 獒, 藏獒 或者 another Tibetan dog mixed dog look it up for the 小狗 looks. This pup looks very similar, ask for 更多 info

Well, it looks like it will grow up to be quite a big dog...