Feeding behavior is an important aspect of pig husbandry, as it can affect protein deposition in pigs. A decrease in plasma threonine (Thr) levels may influence feed intake due to amino acid (AA) imbalance. We set out to study whether different Thr inclusion rates of 70%, 85%, 100%, 115% and 130% of the ideal Thr:lysine (Lys) ratio of 0.65 in two different feeding programs (individual precision feeding (IPF) and group phase feeding (GPF)) could affect pig feeding behavior and consequently protein deposition. Two 21-day trials were performed in a 2×5 factorial setup (feeding systems × Thr levels) with 110 pigs in growing phase (25.0 ± 0.8 kg of body weight (BW)) and 110 pigs in finishing phase (110.0 ± 7.0 kg BW), which correspond to 11 pigs per treatment in each trial. Pigs were housed in the same room and fed using computerized feeding stations. The total lean content was estimated by dual X-ray absorptiometry at the beginning (d 1) and the end (d 21) of the trial. Multivariate exploratory factor analysis was performed to identify related variables. Confirmatory analysis was performed by orthogonal contrasts and Pearson correlation analysis. Graphical analysis showed no difference in feeding patterns between feeding systems during the growing or finishing phase. Pigs exhibited a predominant diurnal feeding, with most meals (73% on average) consumed between 0600 h and 1800 h. Exploratory factor analysis indicated that feeding behavior was not related to growth performance or protein deposition in growing or finishing pigs. Changes in feeding behavior were observed during the growing phase, where increasing dietary Thr resulted in a linear increase in the feed intake rate (P < 0.05). During the finishing phase, the duration of the meal and feed intake rate increased linearly as dietary Thr increased in the diet (P < 0.05). These changes in feeding behavior are, however, correlated to body weight (BW). In conclusion, the exploratory factor analysis indicated that feeding behavior had no correlation with growth performance or protein and lipid deposition in growing or finishing pigs. Dietary Thr levels and feeding systems had no direct effect on feed intake.