I do not use that particular brand because of its very high d3 content. Like i said, i dont think anyone knows for sure exactly how much is required, i just feel more comfortable using a brand with less d3 and using it on everything. That paired with proper uvb lighting should create somewhat of a balance. However, i am not a vet and these techniques have always worked for me to keep my animals healthy, but i do not have a great deal of experience rehabilitating animals with severe mbd