The viscosity of the plain yogurt was also found to be higher than that of all the types of stirred fruit yogurts, in line with the higher level of total solids in plain yogurts as described by Isanga and Zhang (2009), Martin-Diana et al. (2003) and Tamime and Robinson (1999). Isanga and Zhang (2009) further reported that higher levels of fat may also contribute to a higher viscosity of yogurts where homogenised milk (such as the goat’s milk used for this study) is used in production, since homogenisation facilitates copolymer formation between casein and the fat globules thereby strengthening the gel network.