Have you ever tried digging a hole with a shovel? Ground is hard and no the ostrich does not stick his head in the ground. As a matter of fact, when there is trouble in the area the ostrich can run up to 40 mph for approx. 20 minutes at a time.
Not usually with the exception during their breeding season. If coornered or threatened, any animal will become aggressive. The males are more aggressive during the breeding season. All animals should be handled with respect for their nature.
The oil from the emu is an anti-inflammatory and efficient moisturizing oil. It has been researched and proven effective for many skin, and muscle and joint conditions. It is the best carrier oil on earth.
Most upscale American and European restautants serve ostrich and emu meats. Most farms sell the meat products, which is USDA inspected. You can also find the meat at some local farmers markets. The public needs to evaluate the benefits and ask for the meat in their local supermarkets.