Yellow-backed duiker
These forest dwelling antelope feed selectively on plants or plant parts such as shoots, roots, leaves, and buds, but their diet is mainly made up of fruits. The yellow-backed duiker is more efficient at digesting poor quality food than most other duiker species. This allows them to eat large, low quality fruits. Their diet makes them very hard to keep in captivity as most domesticated fruits are not well suited to their low fiber requirements. They are considered concentrate selectors, meaning they eat "diets relatively low in fiber, have a well developed ability to forage selectively, a rumen bypass, a rapid passage and high fermentation rate for starch, and they frequently encounter toxins."
James Bernard Harkin
The pronghorn antelope was another large Canadian mammal believed to be on the verge of extinction. In 1910, the pronghorn antelope was moved from the Banff Paddock into Wood Buffalo National Park. Harkin believed the animal would benefit in a new protected park area. In March 1912, the park reported the presence of fourteen antelope. However, the effort was unsuccessful as the pronghorn antelope population decreased due to a lack of proper diet. In 1915, Harkin continued to play an essential role in antelope preservation near the village of Nemiskam, Alberta, where about 200 starving antelope were found in a rancher near the village of Foremost. The antelope were removed and sent to a reserved area of Maple Creek, where sufficient food and resources were available . On December 18, 1915, Minister William James Roche approved the formal reservation of seven square miles of land and established the Nemiskam National Antelope Reserve. In 1917, the American Permanent Wild Life Protection Fund recognized Canada as the first country to create a fenced preserve for antelope. In 2012, the pronghorn antelope can be found in southern Saskatchewan and Alberta.