Only a few months – Look how he’s grown! Posted on January 23, 2016 by Penny Comet is now four months old! Then: 3 weeks old. Now: 4 months old. Watching the transition has been amazing. 5 weeks old. 2 months old. 3 months old. 3 months old. 4 months. Fireplace puppy. Here’s to many more months… and years!