You can't. So far you can only have romance. Not breed. IDK why, maybe they don't know what to do with mixed breeds. sources: A player of touch pets myself
Depends on the breed. Small breeds can have anywhere from 1-5, and Large breeds can have 1-15.
Yes you can but only when the puppies are full grown adults and when they have a full relationship with each other. This way you can create new breeds of dogs and re breed the the new breeds
There are more than 5 cat breeds, but 5 can be the siamese, the manx, the bambino, the angora, and the russian blue.
The plural form of "half-breed" is "half-breeds."
No, it is not possible to breed pets on PetRPG. You can only adopt other pets. You can also color them, but as I said before, it is not possible to breed them.
Maybe one of the long hair breeds which are used for show like the peruvians or silkies, but if you want to sell them as pets maybe you should condider English (short haired) which are the most popular pet breed.
The Chinese Crested is known as a hairless breed of dog. Hairless breeds of canines are often owned by people who have allergies to dog dander or those who don't want to have large dogs as pets.
It breeds in your garden.
anything
breeds of sheep
If you have a pet hedgehog in the US, it likely is an African Pygmy hedgehog, as that is the only breed that can legally be kept as pets. However there are several other breeds in the wild.