Welcome to Westside Animal Hospital in
Casper,  WY


The staff and veterinarians at Westside Animal Hospital extend a very warm welcome to you. Whether you are new to the Casper, WY area and seek a trusted veterinarian for your pets, or already see us for pet care and need to check which services we offer, we are here to meet your needs. Our veterinarians in Casper, Drs. Doug and Laura Johannessen, treat all of your pets as if they were family members, because we know how important they are to you. Please read on for more information about our services and our mission in providing high-quality animal care. 

Our Veterinary Care Services in Casper

For your convenience, our animal doctor offers the following services:

Wellness care appointments - We encourage you to come in for a wellness care appointment once yearly to make sure your pet is healthy and evaluate for underlying diseases. Whether you wish to talk about your pet's behavior or diet, dental health or heart worm prevention, we are here for you. We have longer appointment times than most vet hospitals, so we can really spend time with you, explain your pet's condition and discuss all treatment options. 

Boarding - Why not leave your pets with us next time you travel? Our dog and cat boarding fills fast, so make your reservations early!

Vaccinations - We can provide deworming and flea control, offer heartworm medication, and vaccinate your pet to prevent against disease. Vaccination is an important part of our proactive approach to vet care. 

Emergency care - We are happy to take emergency appointments when we are open. There is no need to make an emergency appointment. Simply bring your pet in as soon as you can, and call to let us know that you are coming with an emergency. 

Pet dental care - We offer pet dental care under anesthesia, for the comfort and safety of your pet, and for proper evaluation and dental cleaning. Allow us to check your pet's teeth, perform teeth cleaning and polishing, and do all dental care for your pet. 

Animal surgery - We have a state of the art animal surgical suite where we provide surgical services for your pets using the latest equipment and procedures. If your pet needs anything from a spay/neuter surgery to an emergency lifesaving surgery, we are fully equipped to assist. After the procedure, our veterinarians will care for your pet in recovery and make an aftercare plan with instructions for you.  

Spay neuter - Spay neuter services protect your pet's health and help control the animal population. We can perform spay and neuter surgery in our vet clinic and we encourage you to take advantage of this service. 

Stem cell therapy - At Westside Animal Hospital, we are thrilled to offer restorative stem cell therapy for dogs, cats, and horses. Stem cell therapy is usually used to treat degenerative conditions affecting the joints, spinal cord, tendons, and bone injuries.

Platelet-Rich Plasma Therapy (PRP) - PRP is a therapy often used on humans for sports injuries and has only recently been readily used on pets. PRP can be used to treat many common issues for senior dogs such as osteoarthritis but is also is used to treat soft tissue injuries and slow healing wounds. Learn more about PRP therapy here.

Canine cancer treatment - At Westside Animal Hospital, we offer an innovative cancer treatment for dogs called immunotherapy. This is commonly seen as a safe cancer treatment with little to no side effects. Learn more about our cancer treatment for dogs.


Contact Our Casper Veterinarian Today

We are the only veterinarian in Casper, WY certified by the American Association of Feline Practitioners, which makes us a favorite among kitty owners. Yet we also accept dogs, horses, reptiles, rabbits, and pocket pets.

Has it been a while since your pet was in for animal services? Why not take a moment to give us a call today at 307-472-5600, or request an appointment online through the link above or our Facebook page. 

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Office Hours


7:30 am-5:30 pm


7:30 am-5:30 pm


7:30 am-5:30 pm


7:30 am-5:30 pm


7:30 am-5:30 pm




5:00 pm-5:30 pm


Read What Our Clients Say

  • "The entire team at Westside Animal Hospital is fantastic!! They take such great care of both of our dogs - young & old - routine care and/or emergencies!! Thank you to the Drs. Johannessen for all you do for our family:) Our community is truly so fortunate to have you here!"
    -Melissa Y
  • "Very good facility. Both doc's are good about giving quality time and their assistant Ashley is wonderful."
    -Victor J