Male or Female Puppy? What Actually Differs in Frenchies, Cavapoos and Poodles
The differences between male and female small-breed puppies are smaller than most people think. Here's what really changes in size, temperament, training, heat cycles and living with another dog, and when sex should decide it.
"Boy or girl?" is one of the first questions we're asked, and often one of the least important. In small companion breeds, the difference between two puppies of the same sex is usually bigger than the average difference between males and females. If you fall for a particular puppy's personality, that's a better guide than its sex.
That said, there are some real differences. Here they are, without the folklore.
Size
Males are usually a little larger: typically a pound or two in Toy Poodles and Cavapoos, and two to four pounds in French Bulldogs. It's a modest difference, but if you're choosing between a Toy and a Mini Cavapoo for lifting reasons, it can tip the balance. Our Mini vs Toy Cavapoo post covers size in more detail.
Temperament: what owners tend to report
These are tendencies that breeders and owners commonly describe, not rules:
- Males are often more openly affectionate, more food-motivated, a bit goofier and slower to mature.
- Females are often a little more independent, mature sooner and can be quicker to house train.
In French Bulldogs, males are frequently described as the clingier "velcro" dogs. In Cavapoos and Poodles the difference is subtler. Plenty of females are lap dogs and plenty of males are aloof. The puppy's own temperament, the parents' temperament and how you raise it all matter more.
Training and marking
Unneutered males are more likely to mark indoors once they mature, usually from about six months. Neutering, early house training and consistent routines reduce it a lot. Females can be easier to fully house train, but it's a small edge, not a guarantee.
Heat cycles
An unspayed female comes into season roughly every six months, usually starting between six and twelve months in small breeds. Each season lasts about two to three weeks, with spotting, and males in the neighbourhood will notice. That's manageable, but it's a real consideration if you won't spay.
Spaying and neutering: talk to your vet about timing
Research over the last decade suggests the best age to spay or neuter varies by breed and size, so the old "six months for everyone" rule is being revised. Small breeds generally have fewer timing concerns than large breeds. Ask your vet for a recommendation for your puppy's breed and size, and ask us what we've seen in our lines.
If you already have a dog
This is where sex matters most. An opposite-sex pair usually gets on most easily. Two females are the pairing most likely to clash as they mature, though many live together happily. Two males usually get along well, especially if both are neutered. Introduce them on neutral ground and keep the first weeks supervised. Our first week home plan covers how to pace those early days.
Price
Some breeders price females higher, because buyers request them more often or because of breeding potential. We sell puppies as companions, and each puppy's price is set individually, so ask rather than assume a female costs more.
How we suggest choosing
- Decide on breed and size first. The side-by-side breed comparison helps.
- If you have another dog, lean toward the opposite sex.
- Then pick the puppy, not the sex. Watch how each one behaves on a video call or a visit, and use our questions to ask a breeder to learn about each puppy's parents. The confident explorer and the calm watcher are different dogs, whichever sex they are.