Spider Bites on Dogs: Signs to Look for & What to Do

Dogs are naturally curious creatures, often exploring their surroundings with their noses close to the ground. Unfortunately, this curiosity can sometimes lead them into encounters with insects and arachnids, including spiders. While most spider bites on dogs are harmless, some can cause serious health concerns. In this blog, we’ll help you better understand how to identify a spider bite, what symptoms to watch for, and when you should seek veterinary care, so you can make a significant difference in your pet’s health and comfort.

Common Signs of Spider Bites on Dogs

Spider bites on dogs can present with a range of symptoms, depending on the type of spider and the individual dog’s reaction. Some bites may cause only mild irritation, while others can lead to severe medical issues. Here are some common signs to look for:

• Redness and swelling 
• Signs of distress, such as licking, biting, or pawing at the affected area
• Lethargy
• Fever 
• Open wounds or damaged tissue
• Muscle tremors or difficulty walking
• Vomiting or loss of appetite

If your dog exhibits any of these symptoms, particularly if they worsen over time, contact Happy Tails Emergency Veterinary Clinic at (336) 288-2688 for professional evaluation.

Dangerous Spiders in North Carolina

While most spiders are not harmful to dogs, North Carolina is home to a few species that can pose a serious risk. The two most concerning venomous spiders in the region are the black widow and the brown recluse.

Black Widow Spider Bites on Dogs

Black widow spiders are easily recognized by their glossy black bodies and red hourglass marking on the abdomen. A bite from a black widow can inject a neurotoxic venom that affects the nervous system. Symptoms of a black widow bite in dogs may include:

• Severe muscle pain and cramping
• Tremors or uncoordinated movement
• Increased heart rate and difficulty breathing
• Paralysis in severe cases

A black widow bite requires immediate veterinary attention. If you suspect your dog has been bitten, call (336) 288-2688 for emergency care.

Brown Recluse Spider Bites on Dogs

Brown recluse spiders are light brown with a distinct violin-shaped marking on their backs. Unlike black widow venom, which affects the nervous system, brown recluse venom can cause significant tissue damage. Signs of a brown recluse bite include:

• A small, red wound that worsens over time
• Tissue breakdown leading to an ulcer
• Signs of infection, such as pus or foul odor
• Fever, lethargy, and weakness

Early treatment is critical to minimize tissue damage. If you notice these symptoms, bring your dog to Happy Tails Emergency Veterinary Clinic as soon as possible.

What To Do if Your Dog is Bitten by a Spider

If you suspect that your dog has been bitten by a spider, taking the right steps can help minimize complications. Follow these guidelines:

1. Look for redness, swelling, or an open wound.
2. Use a cone or bandage if necessary to keep your dog from aggravating the bite.
3. Watch for worsening swelling, pain, lethargy, or other concerning signs.
4. If the area is swollen, a cool, damp cloth may help reduce inflammation.
5. If your dog shows severe symptoms, contact Happy Tails Emergency Veterinary Clinic at (336) 288-2688 immediately.

How Veterinarians Diagnose and Treat Spider Bites on Dogs

At Happy Tails Emergency Veterinary Clinic, your veterinarian will assess your dog’s symptoms, perform a physical examination, and determine the appropriate treatment based on the severity of the bite.

Diagnostic Methods

• Physical examination – Your veterinarian will check for swelling, tissue damage, and signs of systemic reactions.
• Blood tests – In severe cases, blood work can help assess organ function and infection risk.
• Imaging (if needed) – X-rays or ultrasounds may be used if internal damage is suspected.

Treatment Options

• Medications to relieve discomfort and inflammation.
• Cleaning and treating the bite site to prevent infection.
• Antibiotics to treat an open wound or signs of infection.
• Laser therapy using a Class IV Therapeutic Laser can help speed up tissue healing and reduce inflammation.
• IV fluids, oxygen therapy, or hospitalization for dogs with severe reactions.

Tips for Preventing Spider Bites on Dogs

While it’s impossible to eliminate all risks, you can take proactive steps to reduce the chances of your dog being bitten by a spider.

• Keep your home and yard clean – Reduce clutter, seal cracks, and remove debris where spiders may hide.
• Inspect common hiding spots – Basements, sheds, woodpiles, and garages are ideal environments for spiders.
• Use pet-safe pest control methods – If you suspect a spider problem, consult a professional for safe extermination options.
• Supervise outdoor play – Be mindful of areas where spiders are commonly found.

When Is It Time to Seek Veterinary Care at Happy Tails? 

Not all spider bites require emergency treatment, but some situations call for immediate medical attention. Contact Happy Tails Emergency Veterinary Clinic at (336) 288-2688 if:

• Your dog was bitten by a known venomous spider.
• The bite is causing extreme pain, swelling, or tissue damage.
• Your dog is showing signs of systemic illness, such as vomiting, fever, or tremors.
• The wound is getting worse instead of healing.

With proper care and monitoring, most dogs recover well from spider bites. Follow your veterinarian’s instructions, keep the wound clean, and watch for signs of infection or worsening symptoms. If you have any concerns about your dog’s recovery, call us at (336) 288-2688 to schedule a follow-up visit.