how were the native americans treated at san fernando mission

The San Fernando mission was established in September 1797, officially christened as Mission San Fernando Rey de España. The San Fernando Valley, where the mission was established, was first explored by Spaniards during the Portolá expedition of 1769.
From its founding, the mission tried to convert as many Native Americans to Christianity as possible. The neophytes were primarily from the Chumash tribe. Early on, the mission expressed important production numbers. Besides over 40 converted natives living at the mission (1799 estimates), the mission owned 13,000 cattle, 8,000 sheep and 2,300 horses. By 1804, over 1000 natives lived at the mission. For the most part, the neophytes lived in relative peace at the mission. However, the natives were subject to European diseases, and many did die after being exposed to those pathogens. Much of the mission was destroyed in the earthquake of 1812, with many natives leaving the mission as a consequence.
On March 8th, 1842, gold was discovered clinging to onion bulbs that had been recently harvested at the mission. This was the first reported discovery of gold in California and occurred seven years before the famous California Gold Rush of 1849.
The mission remains an active church today and is a part of the Archdiocese of Los Angeles.
http://www.athanasius.com/camission/fernando.htm