Didn’t know about this

Why Does My Dog Have a Blue Tattoo?
After returning from a two-week work trip, you noticed something strange—a small blue tattoo on your dog’s stomach. Understandably, you’re confused and concerned.
What Are Pet Tattoos?
Blue tattoos on pets, especially on the stomach, are often used to show that an animal has been spayed or neutered.
While less common today due to microchipping, these tattoos were once a standard practice for permanent identification. As the article notes, “These markings were especially popular before microchipping became widespread.”
Could It Be from the Daycare?
If your dog was staying at a 24/7 daycare, it’s important to understand that many such facilities also offer veterinary and grooming services. According to the article, “Knowing the full range of services your facility provides may give you important clues about your dog’s tattoo.”
