Queen Elizabeth likes to take her dogs for a walk in her spacious estates but she might have to leash her beloved Corgis while she is in Sandringham. Three dogs who were in the area have apparently gotten sick from a mysterious illness.

According to Mirror, a visitor from Bedford had to euthanize her six-year-old Shih Tzu after the pooch contracted a Seasonal Canine Illness (SCI). Maggie Hands said that her pet contracted the disease during their stay at the Sandringham Estate. She and her pups were at the Camping and Caravanning Club Site. 

Hands' other dogs, a five-year-old Bichon Frise and a 10-year-old Yorkshire Terrier, also got sick and are still fighting for their lives at the pet clinic. The pet owner said that she doesn't blame the royal family or the Queen for her dogs' conditions.

However, she believes that there should be a public warning about the presence of this mysterious canine illness. Apparently, the most number of dog deaths related to SCI was 15 and it happened in 2015

Local veterinarians do not deny that there have been SCI cases at Queen Elizabeth's estate. The experts added that SCI's exact cause is not known but it generally crops up during the fall season in the woodland areas. Symptoms of SCI include vomiting, abdominal pain, diarrhea, fever, muscle tremors and lethargy.

Experts also warned that those who walk their pups should be on the lookout for a cluster of "tiny orange insects" on their pet's hair. These are mites that can easily transfer from one animal to the next and cause an infection. SCI can be treated with antibiotics but the survival of the dogs will depend on its immune system. The hospitalization process is also critical. 

A spokesperson for the Queen's estate said that they have been mindful of informing and cautioning visitors of SCI. The official website for the country estate has information about the disease since 2018. 

Queen Elizabeth is currently in Sandringham at Prince Philip's Wood Farm. The elderly royals moved to the country estate from Scotland on Wednesday, Sept. 16, to end their summer break in the highlands. 

In August, the Queen was seen walking her pack of dogs at her Balmoral estate. It's likely that the dogs came with her when they left Scotland. However, since arriving to Wood Farm, no one has seen the Queen on her walks with her pups so far.