As part of the cooperation entered into with the Swiss Sandgrueb Foundation (Egg near Zurich) in 2019, Gut Aiderbichl assumed responsibility for the lifelong care of a healthy group of 15 Arabian mares, including Maha Choyan. The Sandgrueb Foundation had taken over the stock of an Arabian horse breeder a few years earlier because she had reached her limits due to age and health reasons. She therefore had to give up her breeding, but wanted to know that the animals were in good hands. That is why she turned to Gut Aiderbichl. Maha Choyan is Mashalla's mother and loves to have her neck tickled.