There is also image2 with corresponding parameters.
image_alt: Alternate text to describe an image to those that cannot see it.
If an image is included, alt text should be provided using image_alt. Alt text should not repeat the caption; instead, it should describe the image to someone who can't see it (see WP:ALT).
image_caption: A caption that describes the image.
altname: Other names by which the breed is known by English speakers.
kc_name: The name of the national kennel club of the breed’s country of origin
Link to a article if it exists then pipe the club’s acronym
There is also a kc2_name and kc3_name if more than one country claims the breed.
kc_std: The URL to the breed standard from that kennel club(s).
fcistd: If the breed is recognised by the FCI, add the URL to the FCI breed standard.
notes: Free-form concise comments, usually about the breed recognition or standards.
notrecognised=yes or notrecognized=yes: Shows a "Not recognis(z)ed by any major kennel club.
extinct=yes: Shows an "Extinct" message. This parameter should be removed if not used.
Special parameter
trinomial=: Replaces domestic dog with custom text. Italics and wikilinks must be done manually in the supplied parameter value. Entirely wild populations like the Australian dingo, use {{Taxobox}}, not {{Infobox dog breed}}. This parameter should not be used with |x=. If in the future we need to indicate a dingo-and-something-else hybrid that is actually treated as a dog breed, we can use |trinomial= for this, or change the template.
The microformat is created by the use of class="biota", and classes for individual taxonomic ranks, such as class="domain" in a span around {{{domain}}} (full list). Please do not change or remove those classes other than as part of development of the microformat. For background information, see microformats on Wikipedia and the microformat specification.