In organic farming an adequate protein supply of breeding sows will be more complicated in future due to the effective organic Council Regulations (834/2007; 889/2008), as several important amino acid suppliers are no longer allowed in feeding; adequate alternative amino acid sources are not available in sufficient amount and quality. Especially in times of lactation, breeding sows have an increased need of high quality proteins and nutrients, in order to cover their own metabolism for milk production. This study was undertaken to investigate how the quality of lactation diet for breeding sows influences creep feeding and the performance of suckling pigs. Starting with their birth, 276 suckling pigs of 24 breeding sows have been observed until weaning after 7 weeks. Due to the results of this study it cannot be assumed that the quality of the amino acid constitution in lactation diets influences the creep feeding of the suckling pigs. Apparently piglets of sows with imbalances in their diet do not try to compensate the supposed lack of nutrients with increased creep feeding. However, it could be determined that the optimised feeding ratio had a significant effect on the suckling pigs? weight. Weight checks in the first week after their birth show that piglets of ideally nourished sows were heavier than the ones of sows with imbalances in their diet. In accordance with the relevant literature, it appeared that the piglets showed a higher readiness to go to the feeder the older they got. Sex-related effects could not be found. Compared to female piglets, male piglets tend to have a higher weight. The average litter performance of both groups was the same; neither did it correlate with the stops at the feeder, nor with the average body weight of the piglets.