Dogs are experts at pretending everything’s fine. One minute they’re bouncing around like their usual goofy selves, and the next… well, something serious could be brewing inside. Sneaky, right?

Splenic tumors are one of those health issues that can hide really well. Your dog might look totally normal while a growth quietly develops in their spleen. That’s why spotting problems early can make a huge difference.

Here’s what this post will cover:

• What splenic tumors are and why they can be tricky to detect.

• Subtle signs that something might be off before it becomes an emergency.

• Practical tips on when to call the vet and what to keep an eye on.

Think of this as your cheat sheet to catching the silent stuff, so your pup stays happy, healthy, and full of energy for all the walks, zoomies, and belly rubs they love.

What Are Splenic Tumors?

Your dog’s spleen might be small, but it’s kind of a big deal. Think of it as a blood filter and a little immune booster rolled into one. It helps keep their blood healthy and fights off infections. Pretty important, right?

Splenic tumors are growths that pop up in the spleen. Some are benign, which means they’re not cancer and might not spread. Others are malignant, which is a fancy word for cancerous, and yes, those can be serious and spread to other parts of the body.

The tricky part is these tumors are masters of hide-and-seek, and dogs are pros at acting normal, even when something’s brewing inside. Many times, you won’t notice anything at all until the tumor grows big or causes complications. That’s why knowing what to watch for, and acting fast, can make a huge difference.

Subtle Early Warning Signs

Dogs are sneaky little actors. They’re great at hiding when something’s off. But there are tiny clues you might catch if you know what to look for:

• Lethargy and fatigue: Your normally zooming, tail-wagging buddy suddenly prefers napping over playtime. If fetch feels like a marathon, pay attention.

• Loss of appetite or weight loss: Skipping meals or leaving kibble behind isn’t always just “picky eating.” Even small changes matter.

• Abdominal swelling or discomfort: Sometimes it’s hard to spot, but a bloated tummy or unusual posture could be hiding something serious.

• Pale gums: Lift that lip! Gums that look ghostly pale can hint at internal bleeding or anemia.

• Unexplained bruising or bleeding: Tiny nosebleeds or odd bruises aren’t normal. Trust your gut, they could be a warning sign.

Behavioral and Activity Changes

Dogs aren’t great at texting us, so they show us how they feel through what they do (or don’t do). Watch for subtle shifts in their usual energy and habits:

• Less interest in walks or play: If your pup usually drags you to the door for a walk but now barely lifts a paw, something could be off.

• Hiding or unusual clinginess: Some dogs retreat when they’re not feeling well, while others suddenly become velcro puppies. Either way, it’s a change worth noting.

• Sudden reluctance to jump or climb stairs: Jumping on the couch or racing up the stairs used to be no problem—but now it feels like a big deal? Pay attention.

When to Call the Vet

Sometimes it’s obvious your dog needs help. Other times…not so much. Here’s how to know when it’s time to pick up the phone (or schedule that vet visit):

• Urgent symptoms can’t wait: Sudden lethargy, rapid breathing, pale gums, or obvious pain? Don’t hesitate; call your vet right away.

• Regular check-ups matter: Even if your dog seems fine, annual exams and ultrasounds can catch sneaky issues before they become emergencies.

• Don’t wait too long: Early detection can make treatment simpler and more successful. Waiting can turn something manageable into a big deal fast.

Diagnosing Splenic Tumors in Dogs

Finding a splenic tumor early can feel a bit like detective work; your vet is Sherlock, your dog is the mystery, and those subtle clues we talked about? They’re the hints. Here’s how vets usually dig in:

• Blood work: Quick tests can reveal anemia or other signs that something isn’t quite right internally.

• Ultrasound: This is like getting a peek inside your dog without surgery; helps vets spot unusual growths or changes in the spleen.

• X-rays: Gives a clear picture of your dog’s abdomen and helps rule out other issues.

Visit Dr. Jeff Werber’s Instagram account (@werbs_dvm) to view and submit questions and answers on weekly AMAs – or call and leave a voicemail at 424-835-0576. Your call will be returned posthaste. For emergencies, download Dr. Jeff Werber’s app Airvet, a video-chat option for veterinary needs at any time of day or night!