Medium Jack

Are Jack Russell a good breed of dog for a pet for a 3 and 4year old?
I’m looking at getting a puppy for my daughters. I want a small-medium size breed. We have a yellow lab and a cat. So it needs to get along with them.
no a jack russell would not be suitable for your family … they do not tolerate little kids well (they can be trained, but as a breed they are not known for their kid friendliness), they are dog aggressive and it would mean zero to the jack russell that your lab is so much bigger, and within that jack russells life it would eat your cat … jack russells were bred to chase and kill vermin, a cat is vermin in a jack russells mind … even jack russells and kittens raised together does not guarantee the cat will live a full life … i would say if you already have a dog and cat, 3 and 4 years old is kinda young for a puppy, you should wait a few years so your daughters can be part of training and caring for the dog … if you buy a pup now it will just be a toy to them, and not many dogs appreciate that …
Schrade Medium Jack