I recently adopted a 5 month old tuxedo cat. He is a sweet, loving boy, but I noticed that he was very gassy. Furthermore, his poops are HORRENDOUS. I've had cats before, and never have I smelled so foul a bowel -- it consumes the entire house! I also noticed that it is slightly runny (I use the Breeze litter system and the pellets were sticking to the poop which only happens with loose stools). I've done some Googling, and most people suggest switching him to a grain-free diet, but he's actually already on (and has been for some time) Blue Wilderness kitten which is high protein and grain free. He was just de-wormed last month. Any suggestions? Could the high protein, grain-free actually be too rich for his tummy? Thank you for any advice you can give!