Hello.
I see you are feeding that new dry. It does seem to have no carb or low ....
I have a friend who could not get her cat to eat any canned food no matter what and she just started experimenting with this food too.
I hope you have a fountain for Lucy and that she likes it because many of us here do heed Dr. Lisa Pierson .( www.catinfo.org)
You want to make sure Lucy gets plenty of water, her kidneys need it from now on.
I am lucky that she has always been a water cat and will drink on demand. I have a whole other thread about her losing weight on canned food. Thank god she loves the zero carb.