Max, a friends cocker, ate it too. Here is the link I posted back then. He pooped it out for over a week, even though they pumped his tummy. He also had to go back for more blood tests, to make sure it was out of his system. Vit K thickens the blood so they don't bleed internaly.
http://petoftheday.com/talk/showthre...threadid=28188
Best of luck to you. Please keep us posted.
Max is doing just fine now. I think he ate it more than once too. His Mom said there wasn't any more, but he pooped it for over a week. But he is doing just great. No side effects from it. The good news it was decon brand, and that you found out that he ate it. Not all brands work with Vit K. , according to the emergency vet we went to. Just make sure to do some follow ups at your vet. Call the emergency vet and ask them about eating it twice. They are more used to these things than a reg. vet and maybe have a different idea.

Again good luck to you