If they are still in the same spot an hour later, call your wildlife center for help. Mother deer often leave their fawns bedded down in a quiet spot while they are off feeding. The mother will return for it and it understands that fact. Do not touch the youngster. Learning to trust humans is not a safe thing for a wild animal.
Mammal parents have a very good sense of smell.
Nearly all wild birds and mammals are protected under the law. They may not be taken from the wild and kept as pets or patients of an inexperienced person. When a wild animal is truly in need of assistance, it should be taken to a wildlife care facility holding permits through the Department of Fish and Game and the U.S. Department of Interior. Wildlife rehabilitators have received extensive training on the care and feeding of native wildlife. The process of rehabilitation and eventual release is more complicated than diet and includes many steps beyond daily care.