It has been 2 weeks since I've switched my BTS's dogfood from low-quality to high-quality. In these 2 weeks, the BTS has had about 3 times more solid stools than in the previous 2 months. So I think my theory was correct. I just wanted to let you guys know.
The previous post pertaining to this was around 2 weeks ago in case you would like to read about the story if you haven't already.


