A total of 120 Hubbard strain broilers having mean weights of 60g were used in a study that lasted for 56 days. The birds were divided into four groups of 30 birds each. Each treatment group was further subdivided into three replicates of 10 birds each in a completely randomized design (CRD). The four bird groups were assigned to; 1) basal diet only (control), 2) basal diet + 10 g kaolin per kg body weight, 3) basal diet + 20 g kg-1, and basal diet + 30 g kg-1. At the end of the study, three birds per treatment were randomly selected and bled by severing the jugular vein; blood samples were collected for haematological and biochemical evaluation. The results obtained showed that significant (p<0.05) differences existed in all the measured hematological and blood chemistry indices vis-à-vis RBC, Hb, WBC, PCV, Ca and P with the treated groups having a better result when compared to the control. It is therefore concluded that dietary kaolin could be added to broiler chickens’ diet without any detrimental effect to the physiological indices evaluated.