There is a Lab at the municipal shelter who will not be put out for adoption because she has allergies.
A Colorado rescue is interested in her but they want somebody to go and assess her before comitting to her. I could end up being the one doing that Friday.

The shelter will let me see her but I don't know how much time and cooperation I'll have. The person I talked to there described her as fine with other dogs, friendly with humans and has seen no signs of food aggression. The rescue seems most interested in finding out about dog and food aggression. I've read a bit on temperament testing but have no formal training of any kind.
I need your input about how to conduct the testing/assessment in such a setting. What would you bring ? I am thinking a good leash/collar, a toy, some food/treats. What are in your opinion the big red flags ? What would be a "green light" dog ? Help !