Check an Australian Shepherd Puppy From Underneath
A young Australian Shepherd's sex shows underneath the body, not in the merle coat or the famous wiggle. With the puppy calm and supported on your lap, look at the belly: a male carries a small, raised prepuce partway along the abdomen, with the umbilical scar just behind it. A female's belly is comparatively smooth, because her vulva is not on the abdomen at all but further back under the tail. Comparing the two landmarks side by side across littermates makes the difference obvious, since every male in the litter shares that forward belly structure and every female lacks it.
Use the Anus-to-Genital Distance in an Aussie Puppy
The anus-to-genital distance settles a young Australian Shepherd puppy when the belly view alone leaves you unsure. Lift the tail gently and look at the spacing: in a female, the vulva sits almost directly below the anus, so the two openings are close together with only a short bridge of skin between them. In a male, the genital opening on the belly is far from the anus, and in a slightly older male puppy you may also feel two small, soft testicles in the scrotum between the back legs, though very young males often have not descended yet. Absent testicles therefore do not make a puppy female; position is the reliable test in an Aussie.
Ignore Coat, Colour and Energy in an Australian Shepherd
Coat and behaviour mislead Australian Shepherd owners because this breed varies so much within a single litter. A bold blue merle puppy can be female, a quiet black tri puppy can be male, and the puppy who herds your ankles hardest at seven weeks is not announcing a sex. Both sexes grow rows of nipples along the belly, so counting nipples proves nothing either, and early size differences reverse as littermates grow at different rates. Even experienced Aussie breeders recheck puppies at several ages, because a wriggly, thick-coated youngster is easy to misread in the first fortnight before the anatomy becomes clearer to the eye.
Record an Aussie Puppy's Sex Beside Its Coat Notes
Recording an Australian Shepherd puppy's sex beside its coat notes prevents mix-ups in a litter where merle patterning makes siblings look deceptively different. Write the sex next to the markings you used to tell that puppy apart, such as a split face, a copper point pattern, or one blue eye, because Aussie puppies change fast and memory blurs within days. Heterochromia, the two-different-coloured-eyes trait this breed is known for, appears in both sexes, so eye colour belongs in the identification column, never in the sex column of your notes.
Handle an Aussie Puppy Gently and Confirm at the Vet
Handle a young Australian Shepherd puppy briefly and low to the ground when you check, because Aussie puppies wriggle hard and a startled twist can end in a fall. Work over a bed or carpet, support the chest and hindquarters with both hands, and stop for a cuddle break if the puppy fusses, since there is no deadline on this answer in the first days home. Ask the veterinarian to confirm the sex at the first puppy visit and to check that a male's testicles descend as expected over the coming weeks, which turns a home reading into a verified fact. Once confirmed, putting that sex on the Australian Shepherd puppy's KinsLe Pet Pass means the identity card anyone is shown already carries the right detail.