The nutrition of the bitch in pregnancy is of utmost importance in order for the fetuses to develop within the bitch without any problems. During the diet, it is necessary to take into account what type of dog it is, what health condition the dog is in and of course whether there are any potential difficulties during birth, which could significantly reduce the health condition of the bitch during pregnancy. After the research, it can be concluded that the problems with the digestive system in dogs are primarily due to poor nutrition of the bitch in pregnancy, which, potentially damaging the fetus or increasing the level of potential fetal loss. Improper feeding of bitch in pregnancy, which is carried out by the owner, can lead to death of the bitch in rare cases if the guidelines when feeding the bitch in pregnancy are not followed. It is extremely important to take care of the bitch during pregnancy, but also about the health condition as well as the condition of the bitch's pregnancy.