My boy Benny has just turned 6 months old and while his brother Sammy is piling on the weight Benny's weight keeps going down and up, a few weeks ago i noticed he seemed a bit skinnier and lighter, so i observed him and he seemed to be eating well, he's still full of energy and pooing just fine. I've spent the past 2 weeks trying to fatten him up with endless supply of raw meats and i tried some duk soup too. He seemed to be getting back to his chubby self again but then again I've noticed the past few days he's losing the weight again. I have an appointment for the vets on thursday. Hopefully will get to the bottom of it but was wondering if any could shed some light on what maybe causing this? And what i could do.