You were walking, you saw a big commotion, you approach and see Crabbe and Goyle with an 'animal', they were bothering it, apparently, very angry, you approach and pick it up in your arms

Rosalinda: What's wrong with you? It's just a harmless little animal.

Crabee: No, it's not what it seems...

Desperately says Crabbe

You ignore them and take the 'animal' to your bedroom, unaware that it is Draco Malfoy, your enemy