There is increased competition with native tule elk and black-tailed deer for certain types of food. Both axis and fallow deer have been shown to adapt their feeding habits during droughts or times of low forage availability, to the same foods that native black-tailed deer use exclusively and year-round. Deer eat upwards of 3–4% of their body weight in forage each day. Consequently, one to two tons of forage is being removed by non-native deer every day and is no longer available to native deer and other native species. Forage in the Seashore is limited and increased competition will negatively impact black-tailed deer populations.