My Mom spoke with the chef ahead of our Arrival, and I also spoke with him to make sure that there will be "safe" food for the girls. So far it worked out perfectly. There is Soy milk, Soy Yoghurt, cereal, and bread they can eat. Yesterday the children's lunch and Dinner were not "safe". Therefore the girls got a special meal made just for them. Weisswuerste for dinner, and spinach creamed with Soy creamer. One caveat however, I think that it would be very difficult to communicate the requirements if I did not speak German.
The picture shows the girls with Omi :)