Luckily Marley and I have plenty of exercise in the evening ( running/walking/rough housing ) so I haven't seen any weight gain. Her poop is what I would call "normal" with constipation once, and i contribute that to too many cheerios, so i dont give those to her anymore. I have also heard about rawhides splintering but when she chews on it , its really soft and "gooey" if you will, before she goes trying to tear it off. So I dont see a possibilty of splinters but hey i am no vet so i am still open to any opinions or stories or treat success stories or "nightmares"