Thanks Melissa and Deb!
I appreciate the response and well wishes. The very littlest guy is hanging in there. I won't be taking him in with the other three tomorrow for tails and dews. Even though he isn't suckling, I don't want to take him away from Mom's warmth and kisses. Plus, I also realize it may be just a matter of time now. I'm not giving up on him, but being realistic that his chances aren't good. I am grateful the three siblings are gaining weight and beginning to act like normal pups should. Sassy is recovering well...she's tired, but eating and enjoying the extra goodies presented to her!