These are fledgling Mourning Doves. My best advice is to put them back where you found them and see if the parents continue feeding them, and if they don't, take them to a wildlife rehabilitator near you. It's really difficult (and illegal!) to care for these birds by yourself.
ETA: Here are some helpful links for you:
Also, welcome to WhatBird!
I agree. Doves are especially hard to care for because the parents secret a "milk" from the lining of their gizzards which is very difficult to synthesize.
Agree. However, it's a myth that the parents won't take them back if you touch them. They'll take them back just fine after they're handled.
Most birds have a very weak sense of smell and would have no clue that a human has handled the chicks.
You should read my post in this thread (http://www.whatbird....__fromsearch__1
) for advice on what to do when you find a "baby" bird.
All Yellow Warblers are yellow warblers, but not all yellow warblers are Yellow Warblers
My Year List
Little Gull: Modseto Secondary Wastewater Treatment Plant, Modesto, CA, 2/9/14
Ruff; Ceres Sewage Ponds, Ceres, CA, 1/28/14
Black Scoter; Richmond Marina, Richmond, CA, 12/24/13
Vesper Sparrow; Cooperstown Rd., Stanislaus County, CA, 12/16/13
Favorite Recent Birds (non-lifers):
Greater Roadrunner: Little Panoche Reservoir, Fresno County, CA, 2/19/14
Vesper Sparrow (6): Little Panoche Rd., Fresno County, CA, 2/19/14
Mountain Bluebird (8): Panoche BLM Access Rd.; Fresno County, CA 2/19/14
Long-eared Owl (12): Mercy Hot Springs Resort, Fresno County, CA, 2/19/14
Mountain Bluebird (3): Little Panoche Rd., San Benito County, CA, 2/19/14
Prairie Falcon, Cassin's Kingbird: Recalde Rd., San Benito County, CA, 2/19/14
Bald Eagle: Wilson Rd., Los Banos, CA, 2/19/14