What kibble are you feeding?
Satin balls can be a good additive for some dogs to put on weight. Sometimes shepherds and huskies are notorious for being hard to put weight on.... if it’s giving them diarrhea it may be too rich or just a tad too much for them. You could try cutting them in half, starting out slow and building up gradually. Canned pumpkin might help add fiber for the stool. It’s really difficult to say for sure without seeing the dogs / the whole picture, but I hope that helps a little.