Just wait until the next meal day. If mine are in shed, and I know they do not like to eat in shed, I simply skip them till the next meal day (either 4 or 8 days later).
All of mine eat while in shed except one. She usually eats a day or 2 after she finishes shedding. Unfortunately she also likes to go off feed as soon as I notice her getting ready to shed......
1.0 blond pastel lesser
1.0 mojave
0.1 pastel
0.1 normal