Let's get some things clear.Are you adding new frogs to a vivarium that has frogs already in it?
If so then I would quarantine the new frogs before adding them to the vivarium.

Now if this is a new vivarium.
Adding frogs that are being shipped from the same breeder more than likely do not need to be quarantined.

Carlos is 100% correct you would want to wait a few days after adding the new frogs to the vivarium before feeding them.
Also I would leave the tank alone and let the frogs settle in and not disturb them.