:::::I take your point about it not summarizing the utilitarian view, but bear in mind that the point is to summarize the protectionist view, and Singer's utilitarianism is representative of it. They are two basic positions in AR theory  abolitionism and protectionism. All the approaches end up as one or the other. I deliberately didn't focus in the lead on the utilitarian/deontology distinction, because increasingly academics are writing that they wish people would stop pushing all AR theorists into one of these two positions. But we do say quite a bit about it in the section about the different philosophical approaches. 

 :::::David Sztybel in Marc Bekoff's Encyclopedia of Animal Rights and Animal Welfare also summarizes the Singer position as the minimization of suffering, by the way. We could use the words "minimization of suffering," rather than "avoidance of suffering," which would better reflect the utilitarian position.