Martin Light

i have just rescued an african grey and he is in a bad way!! Ive had him for 24 hours and he is very timid and nerveous. He has only got feathers on his head. I have seen him plucking them out!! I dont think the owner before gave him fresh veg, so i am giveing him lots every day. The vet says he is ok . i think he is depressed and board. this is my first parrot ive kept. Should i try handling him or let him settle for a few days?? I talk to him constantly to try and get him used to me. Also any tips on how he can get his feathers to grow back?? many thanks martin:)