Your spine should be in a neutral position, and your head should be in line with your spine; this is your starting position, often referred to as the tabletop position.
Begin the cat pose by exhaling and gently rounding your spine towards the ceiling, similar to how a cat stretches its back.
While doing this, tuck your chin towards your chest and let your neck release, but don't force your chin to your chest.
Hold the pose for a few seconds, then return to the neutral tabletop position on an inhale. Repeat the pose several times, moving with the rhythm of your breath.