We live in an apartment and there is a ton of ivy next to our patio. Our cat is at the window every night watching the little rats running around catching the bird seed that has dropped during the day. A week after we adopted Zeus, he started reacting to the rats outside too. I couldn't believe it! He had never barked or anything since we had him (only a week, but still) but it was a huge bonding moment for him and Zeus
They're good little guardians! LOL