This experimentwas carried out to evaluate the dry matter ingestion, average daily gain, feed:gainratio, live weight at slaughter and days in trial in pure Santa Inês and½Dorset ½Santa Inês lambs, submitted to isoenergetic (76.59%TDN) and isoprotein (17.48% crude protein) diets with different sources of vegetableoil (soybean oil, canola and linseed) and a control diet (without vegetableoil inclusion). The forage:concentrate ratio was 30:70, and oat hay was usedas forage. Digestibility analysis was performed, using four no castrated lambsdistributed in latin square design, for evaluating ingestion, fecal excretionand total digestibility of the nutrients. The dry matter intake, expresses inpercentage of the live weight, was smaller in the lambs that received diet withcanola oil in relation to those that received control diet. However, all thediets provided satisfactory average weight gain and feed:gain ratio. The drymatter (76.02%) and organic matter (76.82%) total digestibility values of thecontrol diet were higher than diet with linseed oil (72.11% and 72.97%, respectively),although they have not difference of the diets with soybean (72.94 and 73.71%)and canola oils (73.45 and 74.25%) and these did not differ of the diet withlinseed oil. Digestibility of ether extract was smaller in the control diet(84.02%), while the other diets showed average value of 91.98%. The vegetableoils reduced the digestibility of dry and organic matter, not affecting thedigestion of the other nutrients.
