When specifying components for a hydraulic power unit, the prime mover is sized based on torque, speed, and power requirements of the hydraulic pump. This is fairly straightforward for electric motors bec ause they generally have a starting torque that far exceeds running torque.
Great Danes live on average 8 to 10 years, but have been known to reach 12 years of age. The Great Dane is subject to two main health problems that afflict 99% if them - Dysplasia and Bloat. Great Danes cost more to look after than smaller dogs. Their shots will cost more, especially their heartworm medicine.
1 human year = 7 dog years. Different breeds of dogs age at vastly different rates so this rule of thumb only goes so far. Giant dogs like Great Danes and St. Bernards may have a life expectancy of under 10 years. Chihuahuas might still be going strong at 15.