You should always always always ask them to feed it in front of you. Seems kinda rude I know but it really is the best thing to do. I always ask them and they do.
180g- Mostly BIG fish and some coral. ~80g Nuvo- My coral tank with "happy fish"~ 90g- FOWLR Not the not happy type of fish~ 125g- Freshwater Malawi Cichlids ~10g- Nuvo- The refugees from the Ich of '18