The Rat Fanciers Society of Australia who are listed in the Melbourne
Yellow Pages under Clubs/Pets should have the contact phone number for
a Rebecca Topliss who is a mouse expert and breeder. I do not remeber
where she is located.
Smell can sometimes depend on diet.
Meat based products can make rodents smell. So too can diary products.
Or too many green vegetables.
When male mice develope testicles at about 3 months of age they should
be quite obvious.
Also, on females there is no hair above the vulva and they should have
a slight opening just above the protruding vulva (which is the vaginal
opening). On imature female mice this is often a tiny patch of bare
skin, or tiny indented spot. This needs good eye-sight to check on
mice, and any vet with a magnifying glass should be able to see this or
else they should be in veterinary work...You can often check yourself
by holding the mice bottoms up and gentley pressing the protruding bit
back towards the creatures stomach (in the opposite direction to the
anus. It is addmittably a little hard, especially on wiggly mice or
very young ones, but not impossible.
Males will have hair from the anus all the way down to the penis and a
much greater gap between these private parts than the females do with
their own bits (know what I mean).
Hope this has helped.
Rebekah