Poultry farming represents 30 % of meat production worldwide. The occurrence of animal parasites is an enormous problem of poultry farming. Tins problem is recorded from factory farming as well as from small farming and causes financial losses. The aim of this study was to gain basic data about the occurrence of coccidia oocysts in the excrements of carrier hens. Carrier hens were fed by dietary supplements which were supposed to have influence on native gut microflora composition. This experiment was conducted on 26 individuals of carrier type hens. It was created the experimental and control group (one group consisted of 13 individuals). The experimental group was prebiotics (Biopolym), probiotics (Lactovita) and homeopathic served 14 days in and between each preparation was 14 days interval. The samples of excrements were tested in a laboratory once a week. The decrease of frequency of coccidian oocysts occurrence in the excrements in the experimental and control group was not proved.