Hi, I'm a new member and have 2 yorkies

.. My little 4lb has liver shunt and i just found out she has kidney stones as well. She's been on science diet LD since diagnosed with the liver shunt. I read that Royal Canine LS is also for liver shunt. Does anyone know if one is better than the other? I'm wondering in case her diet needs to be changed.. I'm very concerned about the stones too now.
Thx!