What is proposed is a new ready-to-eat feed for domestic pets, which comprises at least one guanidinoacetic acid component as a constituent effective in nutrition physiology terms. The novel ready-to-eat feed, which may preferably have a water content of >； 8% by weight, can be produced in an extremely economically viable manner, the main component having a significantly higher stability in the course of passage through the stomach/intestine and therefore not being converted to creatine until under physiological conditions. For this reason, the guanidinoacetic acid is also utilized to a high degree by the target group, which comprises especially cats and dogs.
