This idiom is exactly what is says and originated in the early 1700s. It was an actual event wherein a foolish and ungrateful dog bit the hand of the owner who was feeding him!

This idiom is one of the few that you can visualize. Imagine a large angry bull let loose in a shop filled with fine china. The result would be a shop filled with fine china shards, but the origin of this saying was actually about a donkey let loose in a pottery shop and comes from one of Aesop's fables.

The donkey was later changed to a bull because a bull is stronger and larger than a donkey.

This idiom also comes from the fables of Aesop, and means that something or someone that appears harmless is really a danger.

To most people sheep are soft, fuzzy, gentle creatures. Wolves are notoriously thought of as just the opposite, hence the idiom!

No, this doesn't mean that kitty has been getting into the treats! The term "Fat Cat" was first heard in America in the 1920's and refers to a wealthy person. It was said that a rich person could afford to eat well, therefore adding to his waist size. Their wealth would also add to their wallet size, making them the darlings of politicians looking for monetary support.

The "Cat" was added because it rhymed with "Fat." People love rhyming words and a rhyme makes the saying easier to remember. Although not a "Fat Cat", this sculpt by Aleah Klay is big on charm and cuteness.

So if these are indeed the Dog Days of summer, and you've been up to some monkey business, got ants in your pants, or have been burning the midnight oil lately, just remember that your cuddly, friendly bears and animals will be right there with you!