[cypher]

S/he is a russian hybrid, that's a cross Winter White & Campbells Russian, no pet shop Russians are pure bred so you can be sure s/he is a hybrid.
It's impossible to tell from those photos which gender s/he is, we need to see photos from underneath, if need be you can put your ham in a glass jar to have a good look underneath.

Russian hybrids are prone to diabetes so you do need to take a little extra care with diet, no sugary treats, fruit or anything sweet, stick to a good dwarf mix & fresh veg along with other natural healthy treats.