Do dogs have belly buttons?

Some of the funny stuff my kids have said recently. While discussing the date, "Monday, November 14..."

"YESvember!"

While asking how old the dog is (based on previous info. I'd given them):

"Four years old." "Four ears old!" "Four ARMS old!" (Little kid humor in a second language. They're geniuses.)

During the same conversation, I ask, "How old is Mr. Jon?":

"One-hundred years old!" Guess I softballed that one.

And maybe the kicker, this one kid Allen asks me if dogs have belly buttons (in a great combination of Chinese and English), to which I had to say after some earnest thought, "I honestly have no idea." The internet later told me that they do. I'll tell Allen tomorrow.