Recently, the effects of a 1-week administration of cyclic terpene (D-limonene) on neurotransmitters as well as its expected anti-stress effect were evaluated on mice. Considering this, the preliminary aims of Laboratoires Phodé were to investigate the effect of specific and purified fractions of natural plant extracts (Citrus sp.) characterized by a high level of D-limonene (135000 ppm) on the feeding behavior (total feed intake through the lactation phase) and performance of lactating sows and their litters (piglet weaning weight). The trial was performed on sows (n = 98, Topigs genetic stock, ALW = 262 ± 26.6 kg) over 3 repetitions from farrowing (d0) to inseminating period (d36). Control (CTL) and Treated (VéO) groups of sows were completed by setting lactation pairs under the same housing (individual farrowing pens) and feeding conditions (lactating feed: 17.1% CP, 5.57 Mcal/kg ME with a twice-a-day dispensing). The administration of the functional feed additive (VéOPremium, Laboratoire PHODÉ, France – 250 g/MT) was started with a 4-d pre-feeding period before the sows were moved to the farrowing barn (d-4). Data were analyzed under non-parametric tests (Kolmogorov-Smirnov test, Levene-test, independent-samples t-test) using SPSS 13.0 for Windows. There were no significant differences (P > 0.05) between groups regarding the body weight loss of lactating sows. The average lactating FI was significantly higher (+ 4.7%, P ≤ 0.05) in the VéO group compared with the CTL one (157 ± 6.3 vs 150 ± 8.3 kg, respectively). Regarding the average number of weaned piglet/litter of sow, no significant difference was observed between groups (12.25 vs 12.3 piglets/litter, for both VéO and CTL groups, respectively). The average live-weight (ALW) of piglets at weaning showed significantly heavier value (+6.5%, P ≤ 0.05) in the VéO group (ALW = 7.37 ± 0.72 kg) although the piglets were weaned after 26.1 d on average, while the average number of days from birth to weaning was 26.6 in the control group (ALW = 6.92 ± 0.77 kg). These results suggest that the administration of these specific and purified fractions of natural plant extracts are able to support higher sow feed intake and piglet weaning weight (P ≤ 0.05) through lactation phase.