[Naturella]

I use bully sticks from bestbullysticks.com with great success, but I did notice Bruno having much softer stools after that (I can even tell when the bully stick passes – it makes his poop a different color than the kibble poop). I never thought it would be the fat level, because I thought, since the bully stick is… pizzle, then it should be all spongy muscle, no?