Our objective was to investigate supplementing flax and soy oil in milk and then on starter pellets on growth performance and health of dairy calves. Thirty-six female Holstein calves in individual hutches were used in a 12-wk randomized complete block design study. Treatments were (1) control (CON) with no oil, (2) 80 g/d of flax oil (FLAX), and (3) and 80 g/d of soy oil (SOY). Pre-weaning oils were fed with the milk and post-weaning were top-dressed on starter pellets. Calves were fed 2.83 L of pasteurized milk 2×/d during wk 1 to 5 and 1 × /d during wk 6. Pellets and water were fed ad libitum. Fecal scores (0 = firm, 3 = watery) and respiratory scores (healthy ≤3, sick ≥5) calculated from the sum of scores for rectal temperature, cough, ocular, and nasal discharge were recorded daily. Body weight (BW) and frame growth were measured weekly at 3 h post-morning feeding. Results were analyzed using the MIXED procedure of SAS 9.4 with repeated measures. Significant differences were declared at P < 0.05. Dry matter intake (1792, 1487 and 1650 g/d; SEM = 79.5 for CON, FLAX, and SOY, respectively) was greater (P < 0.01) in CON than FLAX with SOY similar to both. There was a treatment × wk interaction (P < 0.01) with calves on FLAX eating less in the last 2 weeks of the study. Calf BW (69.8, 67.2, and 68.0 kg; SEM = 2.39) and gain: feed (0.58, 0.58, and 0.54 kg/kg; SEM = 0.03) were similar (P = 0.38) but had treatment × wk interactions (P < 0.05). The ADG (0.78, 0.71 and 0.76 kg/d; SEM = 0.05), body condition score (2.43, 2.47, 2.41; SEM = 0.027), withers height (82.1, 82.2, and 83.0 cm; SEM = 0.68) and other frame measures were similar (P > 0.05) among treatments. Fecal score (0.57, 0.64, and 0.70; SEM = 0.070) was similar overall but had an interaction of treatment × week (P < 0.01) with SOY having greater fecal scores during weaning and the last 2 wk. Body temperature and respiratory score were similar (P > 0.05). Supplementing flax and soy oil maintained growth performance compared with CON in the pre-weaning period when fed with milk, but decreased intake and BW during the last 2 weeks of the post-weaning period when fed with starter pellets.