good afternoon!

i own an XY/XY male chimera cat that exhibits solid black, black tabby, orange, and white. how is this possible if he is not XX/XY?

we are chalking it up to either a somatic mutation or a possible 3rd distinct set of DNA. we are working closing with Texas A&M to have a skin biopsy done.

we have done karyotyping along with DNA testing. any thoughts?