I think that instead of trying to get her to stop I might change the set up slightly so she's not able to grab the blanket. I'd actually probably change the set up so the blanket wasn't even an option.
I would probably get something to put under her expen that she couldn't grab. A couple of ideas would be a remnant of vinyl flooring from a home improvement store or a stall mat that you can get from a TSC or farm store and use that under the expen . I have raised countless puppies and I guarantee that she will likely continue to do this as she gets older and I like to pick my battles with puppies.
CLICK HERE TO VIEW THE FULL QUESTION AND ANSWER