on all fours; hands, knees, and feet are shoulder width apart

cow

source: Yoga Journal

cat

source: Yoga Journal

child's pose

source

source

downward dog

source

lay on stomach OR crocodile

source

high plank

source

all fours, one arm extended

all fours, one leg extended

all fours, one arm extended, oppposite leg extended

all fours, one arm extended, same side leg extended

all fours, hips to one side