I would love to get the babies together once Bazinga is in the clear with his shots! My two just finished up their shots today so they are free to play and socialize with other dogs! Yay!
Yes, it's common for them to get a little bit of poop stuck to their fur in the back. The best remedy I know of (again, not an expert) is to keep the fur trimmed around their bottom. Otherwise, just resign yourself to the fact that they have to have the occasional "butt bath" as it is lovingly referred to in my house.
Sorry about the kibble issue. Maybe when he gets a bit bigger you can try again. Do you know how big he is supposed to get? How big were mom and dad? My 2 are right around 4# and they are 16 weeks old. Mom was around 7 lbs. and dad was 4lbs. something, so I'm guessing they will be around 6 or 7 lbs. when they are full grown. You are way ahead of me on the house breaking...we are trying to teach our two to go in the yard, which at this stage requires lots of supervision and waiting for them to decide to potty. Sometimes we just give up and go back in the house then one of them decides to go within 5 minutes!
I guess it will just take awhile considering there are two of them and we've only had them for two weeks!