Shiba sits at #464 with 262 entries, registered gender-neutral. This is almost certainly a paperwork artifact — Shiba is a breed name (Shiba Inu, the Japanese spitz-type dog), and most of these registrations are likely owners using the breed as the pet's recorded name, either casually or because the form was filled in fast.
The breed-name-as-pet-name pattern
Licensing systems often catch breed words being used as call names. Shiba shows up the same way Husky, Beagle, and Poodle occasionally appear as registered names. Some owners genuinely call their dog Shiba; others wrote it on the form because the dog is a Shiba Inu. The data cannot distinguish the two cases.
If you actually want it as a name
Shiba (柴) means "brushwood" in Japanese, referring to the brushwood-colored coat the breed is named after. Used intentionally as a pet name, it works best on a Shiba Inu (the obvious case) or as a deliberate ironic pick on something the opposite — a Great Dane named Shiba reads as a joke, which is the only way a non-Shiba can carry the name without confusion.
Sound and crossover
The two-syllable shape (SHEE-ba) is clean and easy to call. The Koda pet name page, the Shiba Inu breed name page, and the broader trending pet names list show Japanese-derived picks holding steady at this rank tier. Shiba is unusual in being functionally locked to a single breed.
The Doge meme echo
Shiba Inus also became internet shorthand for the Doge meme (originating around 2013) and the cryptocurrency named after it. Some younger owners reach the name through this route rather than through the breed directly, even when the dog isn't a Shiba. That small contingent is part of why the name is registered gender-neutral.