Callen's house.
'Ever thought of raising pigeons? They're such nice birds.' Anna asked. 'Plus, they can carry messages.'
'I don't know. Pigeons seem all nice and such, until they leave their business on the car. It's happened to me a few times, and Sam tries very hard not to go ballistic when it happens to the Challenger!' Callen replied.
'Wouldn't it be nice to try and raise a couple though? You know, just to see what it's like?'
'Well, since you're so persistant, okay. Let's try. Though, if they poop on the car, you're cleaning up the mess!'
A few days into the pigeon experiment.
'Well, how's it going?' Callen asked.
'These birds poop all the time! I'm up to my knee in bird poop! How do regular people raise birds like this?!' Anna exclaimed.
Callen then started laughing.
'What's so funny?'
'Nothing! I just think it's pretty funny hearing you say 'bird poop!' He replied.
'Hey, you try cleaning up after these pests!'
After a couple more days, Anna decided to get rid of the birds. Which was probably a good thing, as Callen put it, because he said that if the birds got loose and pooped on any of Hetty's cars, she would have them shot on sight with no mercy.