About one month ago, I bought two rose ringed parakeets (bought them 1 month ago, which means they are 5 months old) and let them accomodate themselves to the new surroundings, i tried sharing food with them, i spoke calmly to them, made no sudden movements and did not make any loud noises. However after 1 month, while I simply go past their cage, they just go to the back of it and do not come back. I tried doing everything to make them not be scared of me anymore (even letting them out of the cage) but they just still get scared. Am I doing something wrong? Should I give them more time?