I think I'd be inclined to stick with what she's on now and just cut down the portions--and get the ex retrained...
Really, I think the semi-raw is better for her than the prescribed food (regardless of what the tech thinks
) and portion control will work just as well as any low-cal formula. We adjust portions all the time here--if one of ours is getting heavy, we cut back some; if they're feeling a tad boney, we add some. Normally we adjust by small amounts...and maybe just by eliminating the snacks Zoe gets from the ex, the weight issue will go away
If the snacks aren't enough, then cut back on her portion by a quarter cup to start, let her get used to that and cut the amount again if necessary.