The results of the water holding capacity (WHC) showed substantially different behaviours among the rennet gels of goat milk at different US pretreatment time (Fig. 4A). In 0–10min, there was an increase in the WHC with the prolonged US pretreatment time and the ratio of increase for WHC was about 40%. In samples pretreated for more than10min,there was some decrease in the WHC but was not significant. Compared with the gels of cow milk (WHC,19%), the value of goat milk gels without US pretreatment were lower. The US pretreatment could therefore be responsible for the increased WHC of gels.