NemoBeaker

Hello! I recently bought a new budgie, Beaker, to keep my one budgie, Nemo, company after his friend died a year ago. After an adjustment period they have become best buddies. My question is that after Beaker came into his life Nemo went into a big molt and sleeps more often than he used to. He does eat and drink and is chatty and active while awake. Was the big molt and sleeping more often because of the introduction of the new bird? Thanks for your thoughts and advice!