Yep, definitely say something. I would talk to the room leader or centre manager about your concerns. I have not heard of Day Care giving juice? Ours is water only with the kids encouraged to get their own.
Our creche is great 99% of the time. DS2 had a room change going from the 2s rm to 3s rm. He is not toilet trained yet (this weekend ). When he changed rooms I am not sure what happend but on his first day I picked him up and got him home and realised he came home in the nappy I had sent him in that morning. I rang creche immeadiatley and the manager was very apologetic and talked to the carer's in that room. He and one other in that room are the only ones not toilet trained yet. They apologised to me and DS2 when he went the next morning.
I also had a problem at one stage when DS2 was in a younger room where he had been bitten twice in 1 week, so again I rang the centre and they spoke to the carer's in that room. She explained they try to keep a very close eye on the known biters. It never happend again

So it is definitley worth speaking up