Found baby pigeon, Please Help

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Hi All, I need help I found a baby wood pigeon yesterday whilst at work in the warehouse. He is nearly fully feathered so to start with I thought that maybe he was learning to fly and just got lost so I placed him outside on the grass near some trees but after about 5 minutes 3 nasty crows started to attack I chased these away and decided to take him home. He is in a large box now in my garage I have given him a small towel so he can sleep, I have also placed a bowl of water in there with him and put some bread soaked in water in a bowl and finally sprinkled some dry breat which has seeds in it over the floor.

He was very quite last night so I just left him this morning before I went to work I went in to change his water and food and he seemed a little more alert and he has pooed so I'm guessing that must be a good sign.

I really dont know if I have done the right thing by taking him home, or if I'm caring for him correctly please can someone give me advice so I can give this little guy the best chance.