The research presented in this article examined the gastrointestinal nematode (GIN) cost of living in a group and whether the benefits of group living are enough to offset the negative effects of parasitic affliction. The researchers tagged wild Grant’s gazelles (Nanger granti) and individuals were randomly assigned to either the treatment or control group. Treatment animals received an injection of an anthelmintic drug while controls were injected with saline solution. They then followed and monitored these animals for approximately 500 days after treatment and measured parasite counts and group size. They found that although living in larger groups increased the rates of infection and re-acquisition of the parasite, individuals in larger groups also fed at higher rates than those in small groups, counteracting the cost of infection. Based on their findings, they concluded that living in large groups may have evolved in species like these as part of the selection pressure to reduce the impact of parasitism on those species’ fitness. This supports the idea that individuals living in groups can have higher parasite burdens than solitary individuals, and yet still experience less of a fitness reduction due to parasitism. The researchers were unsure about the specific mechanisms that caused the behavior they observed, but proposed the idea that competition within large groups may stimulate individuals to eat at higher rates. This study is important because it shed light on new benefits associated with infection among group living species that had not previously been well described.