If a dog walks, it will get stuck in a gutter.
Play on the proverb 犬も歩けば棒に当たる (If a dog walks, it hits a stick). The phrase is used to mean both that good and bad fortune may come to those who go out of their way to attempt things. The phrase also starts with and is used to represent the syllable "i" in the Edo version of Iroha Karuta.