Have you inspected her for any injuries, if so, did you find anything? Could you provide a video of her doing these motions?
This is expected with shock, but I suggest you continue monitoring their feed, and water intake.
Shock and stress will usually cause the birds to stop producing eggs- this can last to a few days, to a few weeks. Egg binding can occur in ducks, and it is more likely to occur shortly after a stressful event like this, in the case there was an egg in the oviduct during the attack.