Williamson Animal Hospital

05/19/2026

Upcoming Closings

The Williamson Animal Hospital will be closing Wednesday, May 20 at 4 pm.

We will be closed this Friday through Monday, May 22 through May 25 (Memorial Day) while Dr. Semilof is out of the office.

Dr. Semilof will NOT be available for emergencies during these times.

If you have an emergency, please call Ark Urgent Care at (585) 487-8700 or Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.

We apologize for the inconvenience.

Meet Midge! Midge came to us after being trapped on an abandoned property. She is sweet as pie, talks incessantly and truly can NOT get enough attention! You may see her hanging around when you visit us, so don't forget to say hi. She would do well in a quiet home with someone who has lots of time to pet and cuddle her.

05/07/2026

Upcoming Closing

The Williamson Animal Hospital will be closed Friday and Saturday, May 15th and 16th while Dr. Semilof is out of the office.

We will be open Thursday, May 14th from 8 am to 1 pm for medication pick up ONLY.

Dr. Semilof will NOT be available for emergencies during these times.

We will have limited hours the following week as well and will update you soon!

If you have an emergency, please call Ark Urgent Care at (585) 487-8700 or Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.

We apologize for the inconvenience.

Meet Bentley, a handsome golden retriever who recently celebrated his 9th birthday! We hope he had a wonderful celebration!

But how old is that in human years? According to the American Kennel Club, "15 human years equals the first year of a medium-sized dog’s life. Year two for a dog equals about nine years for a human. And after that, each human year would be approximately five years for a dog." That puts Bentley at about 61 human years young!

04/16/2026

Special hours next week!

The Williamson Animal Hospital will be open the following hours for next week:

Monday, April 20: 8am to 1 pm
Tuesday, April 21: 8am to 5 pm
Wednesday, April 22: 8am to 4pm
Thursday, April 23: 8am to 4pm

Dr. Semilof will NOT be available for emergencies on Monday, April 20.

If you have an emergency, please call Ark Urgent Care at (585) 487-8700 OR Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.

We apologize for the inconvenience.

Meet Fuzzy, a 3-year-old gray domestic short-haired cat, who has found a cozy place for napping in the bathroom sink. So, why do cats like to sleep in the sink?

According to Catster, the sink is a comfortable, cool, quiet place where they can feel secure while they rest. It's a perfect shape for their bodies. Cats also like to drink from the faucet. If you want to stop your cat from taking naps in your sink, you can try closing the door to the bathroom - not for long, just long enough for your cat to learn the sink is not the best bed. You can also try creating a napping space at approximately the same level that your cat will enjoy, like on a cat tree. The final suggestion, and this works for keeping your cat off the counter, is to lay aluminum foil in the sink and/or along the countertops - cats usually hate aluminum foil.

04/01/2026

Special Hours

The Williamson Animal Hospital will be closing early this coming week while Dr. Semilof is out of the office.

Our hours will be:
Monday, April 6: 8am to 8pm
Tuesday, April 7: 8am to 5 pm
Wednesday, April 8: 9am to noon
Thursday, April 9: 9am to 1 pm for medication pick up ONLY
Friday, April 10: 9 am to 4 pm
Saturday, April 11: CLOSED

Dr. Semilof will NOT be available for emergencies Wednesday, April 8 through Sunday, April 12.

If you have an emergency, please call Ark Urgent Care at (585) 487-8700 or Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.
We encourage you to follow us on Facebook for regular updates on news and hospital closings.

We apologize for the inconvenience.

Meet Maximus! Maximus is an 11-year-old Mastiff mix. He loves to cuddle in his afghan throw that his grandma gave to him. Maximus has a special coat color called brindle that is defined by the dark stripes of fur on a lighter background coat color, kinda like a tiger's. According to fluffytamer.com, brindle is a rare coat pattern in dogs, though its rarity depends on the breed. It’s caused by a rare recessive gene that affects how pigment is distributed in the hair follicles, creating dark stripes or swirls over a lighter background. For a dog to show brindle, it must inherit two copies of the recessive brindle gene — one from each parent — which makes it less common than dominant coat colors.

02/19/2026

We have special hours coming up next week!

The Williamson Animal Hospital will have limited hours the week of Feb. 23rd while Dr. Semilof is out of the office.

The hours will be:
Monday, Feb. 23, 8am to 8pm
Tuesday, Feb. 24, 8am to 1pm
Wednesday, Feb. 25, 9am to noon (medication pick up ONLY)
Thursday, Feb. 26, CLOSED
Friday, Feb. 27, 9am to 1 pm
Saturday, Feb. 28, CLOSED

Dr. Semilof will NOT be available for emergencies during these times.

If you have an emergency, please call Ark Urgent Care at (585) 487-8700 or Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.

We apologize for the inconvenience.

Meet Xena, a 14-year-old yellow Lab. With the sun shining down this beautiful girl, don't you feel warmer already?

Maybe not, but you know what? Ticks don't seem to mind the winter cold. In most areas of the U.S., the high season for ticks runs from April through November, but veterinarians recommend you use tick preventatives all year round. Infection from a tick bite can occur at any time of the year. Some tick species move inside during the winter months where they are closer to humans and pets, while others make a type of antifreeze to help them survive during the brutal cold of winter. Crafty little pests!
(*Source, DVM360)

02/10/2026

Closed this weekend!

The Williamson Animal Hospital will be closed this Friday, Feb. 13th at 1:30 pm and all day Saturday, Feb. 14th while Dr. Semilof is out of the office.

Dr. Semilof will NOT be available for emergencies during these times.

If you have an emergency, please call Ark Urgent Care at (585) 487-8700 or Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.

We apologize for the inconvenience.

This is R***r Rue, a 4-year-old Australian Shepherd. He's drying off and humoring mom while she takes a picture of him with a towel on his head. (Actually, he really loves the camera!) He wants to remind everyone to be safe in this snow, so keep reading!

Here's some snow safety tips from the ASPCA: While it’s fun to see dogs romping in the snow, ASPCA experts stress that winter play can be dangerous if not done safely.

Winter weather can bring more than just snow — it can also bring ice-melting chemicals, antifreeze, and extreme cold. These can cause chapped paws, skin irritation, and even frostbite if pets are left outdoors too long ASPCA.

Limit outdoor time — If it’s too cold for you, it’s too cold for your dog.

Protect paws — Massage vet-approved paw protectants into pads before going outside; booties can help.

Watch for hazards — Remove snowballs from between toes to prevent irritation; check for cracks or redness.

Use pet-friendly ice melts — Avoid those containing ethylene glycol; opt for propylene glycol or other safe products.

Keep pets warm — A long coat or sweater with collar coverage can help; never shave dogs in winter.

Dry and clean after play — Wash and dry paws and stomach to remove ice, salt, and chemicals.

Avoid antifreeze spills — This is toxic and can be fatal if ingested.

Feed extra in winter — Pets burn more energy to stay warm.

02/07/2026

FREE to a good home!

These sweet kitties are in need of a new home. Their owner unexpectedly passed away, which has beenquite an ordeal for them.

The big orange fella is Kanga. Kanga is an 8 year old neutered domestic shorthair. He is incredibly sweet, but a little shy at first. Once he gets to know you, he is duper loveable. He has been fully vetted.

The tabby and white kitty is Tango. She is a 6 year old spayed female, domestic shorthair. She is very nervous but is very sweet. She also has been fully vetted.

Ideally, we would like to see both of these kitties go to a new home together, but for the right person we are willing to separate them. We do require that they both MUST be indoor only.

Help us find them a good home!

If you are interested in adopting one or both of these adorable cats, please contact us at 315-589-8439.

02/03/2026

The Williamson Animal Hospital will have limited hours Wednesday and Thursday, Feb 4th and 5th while Dr. Semilof is out of the office.

Our hours will be:
Wednesday 8 am to 1 pm
Thursday 8 am to 4 pm

We will be closed Friday and Saturday, Feb. 6th and 7th

Dr. Semilof will NOT be available for emergencies from Wednesday, Feb. 4th through Monday, Feb. 9.

If you have an emergency, please call Ark Urgent Care at (585) 487-8700 or Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.

We encourage you to follow us on Facebook for regular updates on news and hospital closings.

We apologize for the inconvenience.

This is Tye. He is a 10-year-old medium-hair kitty and a super handsome boy! Let's give him some love!

12/23/2025

So happy we could help!

This baby was dumped a few streets over. Thank you to the finding family for doing the right thing and bringing her inside and then finding help.

Thank you also to the Williamson Animal Hospital for being able to see her tonight.

Anyone wanting to help cover her vet bills can donate to Mew-Mew House or directly to the vet.

Now I'll need to give her a name!

12/22/2025

The Williamson Animal Hospital would like to wish our clients and patients a very Merry Christmas and Happy New Year!

Our hours will be:

Wednesday, Dec. 24 from 8 am to 1 pm.

Thursday, Dec. 25 CLOSED

Friday, Dec. 26 from 8 am to 5 pm

Saturday, Dec. 27 CLOSED

Wednesday, Dec. 30 from 8 am to 1 pm

Thursday, Jan. 1 CLOSED

If you are a current client and you have an emergency, please Dr. Semilof on her home phone at 315-483-2392 and on her cell at 315-573-4433.

If you are NOT a client, please call Ark Urgent Care at (585) 487-8700 or Rochester Emergency Vet Services at (585) 775-0020

We ask that you please plan ahead with any medication requests.