I also forgot to mention. You said they are not eating well. This can be a problem, there are many things that will cause them not to eat.
My first concern is tank setup, but since you have other turtles i'll skip it. I would like to mention though, that with younger turtles you can keep the tank a little warmer, (like in the low 80s) as long as you babies have a place to bask and cool down a little if they get to hot. My 2 babies stay about 80-84 (mostly such a difference my cause my room changes from 60-80 degrees due to house's heater problems)
Turtles are suseptible to stress. You've problem heard this before too, but give them a couple days, they my be stressed out with the move and all the changes and handleings. My two babies didn't eat well the first 2 days but got their appitites back by the end of the week.
They could also be sick, hopefully not, this would be the worst of the other two problems.
A note on feedings* Baby turtles are mainly carnivorous, they become more herbivous as they age. Young turtles need a diet low in protein but high in calcium. To much protien can cause shell deformities. You would be best to go for a hatchling food, but this stuff is hard to find, you usually have to order it online. Next best thing would be crushing up you normal turtle pellets. I find that my babies love the tiny dried shrimp you can find in the fish food section. Something I have recently heard about are these reptile rehab kits. They are usually called something like Reptile First-Aid. Supposedly they are drops of liqid nutrients that keep your pets hydrated and nurished and help get their appitite back. I haven't tried it myself but i have heard good things about these products.
Hope all this helps.