Lynn Wimmer was an associate veterinarian at Carroll County Veterinary Clinic for many years before she purchased it in 2005 and became the lead veterinarian.

In the early days, the sign outside the clinic (which has since moved but has a new sign) posted things like upcoming community events. But one day she decided to post something funny, got lots of good feedback, and began using the signs to run a new joke each week.

The clinic has received international attention for these funny jokes and puns.

“Now we have people that aren’t even clients that send us cards,” Dr. Wimmer told the Baltimore Sun. “It’s amazing, and it’s so awesome that people can laugh and smile ― especially right now. People are saying that they drive out of their way just to see the signs.”

Here are 33 of the best “dad joke” signs that made us giggle: