Thank you so much for your input everyone! The vet says he is at a perfect weight right now in proportion to his body. His Mom was 6 1/2 lbs and his Dad was around 6. I will continue to monitor him, especially because he won't be neutered until he is 6 months. His hair is growing so much! I can see the blue coming already
I'm going to give him a bath today and see if his ears will remain standing.