Anyone ever use 'satin balls'? I have a dog who needs to gain some weight quickly and preferably cheaply and was wondering how much the satin balls helped. He wants to eat but he doesn't gain no matter how much I feed him. Right now he is getting 6 cups of Diamond High Energy kibble, 3-5 chicken/duck eggs, along with chicken meat scraps. I just don't know what else to give him and with him eating as much kibble I don't think I will able to continue to feed him as much as he is getting because Diamond kibble isn't cheap. The bag says 2-3 cups for a 50-60 pound dog and he's getting 2-3 times that. He just eats and eats without gaining (that I can see anyways). I'm going to start weighing him daily to track his progress. His hips, back, and ribs are where the lack of muscle/fat shows the most. Then his hindquarters and shoulders don't have a whole lot of muscle either. Has anyone tried satin balls? Supposedly they make them gain weight within a few days but I don't want to make them to find out they don't work. Also, should they still be pulling the bike? They get time off leash to run but the pulling would help the build muscle, I think. But then again I also don't want the skinny dog to loose more weight from having to exert more energy. What do you think?