They're both so adorable! Glad they get along so well! Reminds me of my RB Corey when I first brought my Sassy cat home. She was the first real friend he had (other than a few g.pigs) and I was so worried they wouldn't get along or he would hurt the kitty. (Corey was 92 lbs, Sassy 2lbs)They hit it off beautifully!
I'm sure Duke and Doogie will be bestest friends!