First of all...THANK YOU for adopting a poodle in need! Secondly, PLEASE post some pics...we LOVE pics!!!
1. Do we still feed him same foods (trying to switch to Blue Buffalo from Science Diet)?
YES...at a year old he should be eating adult food anyway, right? And BB is a good choice!
2. Do we still take him to school? What is the expectation--do they still learn well when grown up?
Yes! You can, indeed, teach an old dog (even though 1 or 3 years old is far from OLD!) new tricks! Plus, it will be a great bonding experience for you guys!
3. He is not neutered--should we still do it? What kind of difference does it make--shelter was supposed to do it, but has not yet.
DEFINITELY have him neutered!