Leopaldi Angels

All
Looking for some advice, My Leopoldi Angels have gone off their food and have become a little lacking in their energy, water parameters are fine and the Altiums and Manacapuru's are fine. The Leopaldi angels were all together and were moved to their new home about 2 months ago same water same feed etc. One or two are starting to look a little on the thin side now and I am getting concerned any advice as I am lost ......

Have you tried worming them?
Also, on occasions I've found newly hatch brine shrimp useful for getting even quite large fish to feed when they go on a fast.

I havent wormed them as yet, I have added metro for 7 days hoping that this would sort the situation which clearlyt it hasn't what would you recommed ?
Fluke solve, wormer +, panacure puppy

I tend to use NT labs "Anti Fluke & Wormer", it's the aquarium version of Flukasol, the active ingredient is Flubendazole, which is the same as in Wormer plus, and a number of other product too.