Optional!
When trying to get the documents for the butchr shop, go talk with the lion near the circus, he'll give us meatballs to giveto his kids.
Go to the zoo and give the meatballs to the lion cubs, then go to the staff room to the right and talk to the scientist.
Come back to father lion and talk to him to get the recipe, then go back to the sientist and give it to her.
Before going to tell Sandro about the documents, talk to the circus lion again to get the achievement.