Keep in mind if you bring veggies and leave them in his cage, they might not get cleaned out of the bowl until the employees feel like it. Ask the employees if you leave sweet potato in the bowl, how long it will be before it is removed and the bowl cleaned. Otherwise, it could be in there for quite a while growing bacteria. You might even mention your concern abut bacterial growth in the soft food so they know its important not to just give the oppropriate answers which is of course we clean the bowls every day when really they may or may not depending on how good the store is. Some places only feed dry food because then you don't have to clean the bowls so often since it doesn't grow bacteria as fast.
Ask them how many cc's are in a syringe. It could just be that he relapsed because he got a little insecure about something or maybe they were late with the seed refill one day or changed brands of food. Sometimes babies relapse and hang on to the formula because they have a subclinical bacterial infection. If he doesn't drop back down to just a few cc's here and there pretty soon, a vet check might be in order. Babies do normally go back and forth at the tail end of weaning. It can sometimes take a few weeks to finish it up where they go from not wanting any formula one day, to "please feed me because I'm starving and desperate" the next. Especially if they aren't offering any warm or mashy veggies to help the baby transition from formula. And yes, normally you feed them until they stop asking for it. Although personally if I have a chick that just seems to be hanging on to a feeding for no apparent reason but is otherwise eating on its own good, I'd start to slowly reduce the amount offered and give him a bunch of warm veggies right after the formula to teach him to eat on his own to make the hungry feeling go away. Thats just what I do. Petstores don't always want to mess around with that though.
