1Gray

Hello all, I am new to the forum and to being owned buy a gray. I have had conures before and they were a blast. I had to give them up for adoption about 4 years ago and have missed my feathered friends ever since. I recently adopted an congo african gray off of craigs list last week. I am not sure of the sex of the bird but I will have her DNA'd asap to find out. I was told she was 6 years old and says a few things. She was not fed a good diet only the crapy seed mixes you see in wal-mart they told me she would not eat anything other than the seed mix. They also told me her cage had not been cleaned in three weeks. I went out and bought Zupreem fruit blend for her and tossed the seed mix, I know you should swich their food slowly however I feel if I had left the seed in with her she would not have ate the zupreem. I gave her the zupreem in her bowl and she sat and ate for about 15 min. I was so happy to see her eat somthing that was good for her. My question for you that own or are owned by grays is: If they stop learning to talk and pick up new words at what age do they do so?