Avatar photo

JoAnna Pendergrass, DVM

Atlanta, GA I am the owner and founder of JPen Communications, a freelance medical writing business.


  • Featured in numerous articles, presenter at the 2020 American Medical Writers Association Annual Conference


Dr. Pendergrass graduated from the Virginia-Maryland College of Veterinary Medicine with her Doctor of Veterinary Medicine Degree. She then completed a 2-year postdoctoral research fellowship in neuroscience at Emory University in Atlanta, GA.


As a veterinarian, Dr. Pendergrass combines her veterinary expertise with her passion for pet owner education to write clear, concise, and engaging articles on pet care . Since beginning her medical writing business in 2016, she has written hundreds of articles for clients such as Pet Coach, PetMD, Great Pet Care, and several pet insurance companies. She is an active member of the American Medical Writers Association and the BlackDVM Network.


Outside of her writing responsibilities, Dr. Pendergrass loves reading, watching funny TV shows with her husband, and exercising. As a lifelong music lover, she plays the viola in one of Atlanta's local volunteer orchestras.


Orange cat lounging in veterinarian cage pancreatitis in cats

Pancreatitis In Cats: Causes, Symptoms, & Treatment

If there was a “difficult feline diseases” award, feline pancreatitis would certainly be in the running. It is difficult to diagnose, difficult to treat, and difficult to determine what causes it. Pancreatitis in cats is relatively rare, reportedly affecting less than 2% of cats. Despite its rarity, this disease is quite serious and can be fatal, so it’s important for...

Read more

How Long Do Cats Live?

Cats have co-mingled with humans for thousands of years. During that time, cats have ingrained themselves in our lives as well-loved and well-cared for pets and family members. As to how long cats live, that depends on many different factors, which we’ll go over in this article. The average lifespan for cats is 15 years, but this varies from cat...

Read more
Urinary Tract Infection in Cats Feature

Urethral Obstruction In Cats: Causes, Symptoms & Treatment​

Have you heard of a “blocked cat?” No, this doesn’t describe a cat that loves to play with blocks. A blocked cat suffers from urethral obstruction, a serious and life-threatening condition that is relatively common in cats. There’s a lot to learn about urethral obstruction, so settle in and get comfortable. We’ll walk you through how urethral obstruction occurs and how it’s diagnosed, treated,...

Read more

Cat Vomiting Blood: Causes & Treatment

Talking about cat vomit never makes for pleasant conversation. But, when it comes to cat care, vomiting is quite an important topic. It becomes urgent when there’s blood involved. A cat vomiting blood, called hematemesis, is a serious medical issue that requires veterinary attention and care. Are you sufficiently convinced that cat vomit is an issue worth talking about? We...

Read more

Feline Viral Rhinotracheitis (AKA FHV): Causes, Symptoms, & Treatment

Cats don’t exactly get the common cold, but they definitely have their fair share of respiratory diseases, which can be caused by viruses, bacteria, or fungi. Feline viral rhinotracheitis (FVR), also known as feline herpesvirus, is a common feline respiratory disease. We’re going to explain everything that you need to know about FVR. How Common Is Feline Viral Rhinotracheitis? FVR...

Read more

Kidney Failure In Cats: Symptoms, Diagnosis, & Treatment

With old age in cats comes age-related health problems. One of these problems is kidney failure, a progressive disease defined by a significant loss of kidney function. Kidney failure in cats is a big topic, so we’re going to cover a lot of material in this article. We’ll start with some background about the kidneys, then take a deep dive...

Read more
Eosinophilic Granuloma Complex in Cats Featured Image

Eosinophilic Granuloma Complex In Cats

The eosinophilic granuloma complex (EGC) in cats is, well, complex. Rather than being a disease unto itself, the EGC is a collection of skin lesions that affect cats. In this article, we’ll tell you what you need to know about the eosinophilic granuloma complex in cats. Basic Definitions Before we talk about EGC lesions, let’s first go over some terminology....

Read more
cat receiving subcutaneous fluids

How To Give Subcutaneous Fluids To A Cat?

Like people, cats become dehydrated when they lose more fluids than they can replace. Certain medical conditions in cats can cause dehydration. For example, with chronic kidney disease, more fluid is lost through the urinary system than a cat can replace by drinking water or eating moisture-rich foods. Dehydration can make a cat feel icky. Subcutaneous (SQ) fluids are administered...

Read more
Pyometra in Cats Feature

Pyometra in Cats: Causes, Symptoms, & Diagnosis

Pyometra in cats, defined as an infection of the uterus, is nothing to play around with. It is life-threatening and requires immediate and aggressive treatment. Without treatment, cats with pyometra can become extremely ill and possibly lose their lives because of the havoc that pyometra can wreak on the rest of a cat’s body. There’s a lot to learn about...

Read more
feline hyperesthesia cat with dilated pupils

Feline Hyperesthesia Syndrome

Your cat is lounging in the windowsill, looking perfectly serene. Then, all of a sudden, she perks up, jumps off the windowsill, and runs screaming through your home.  What on earth just happened?!  No, your cat didn’t just get spooked by a ghost. She probably just had an episode of a rare and bizarre disease called feline hyperesthesia syndrome (FHS).  ...

Read more