Depending on how fast he matures it can be anywhere from a month and a half after birth to about six months.
Why not? as long as they love each other.
yes
about 1feet tall or 11 inches
I think Cookie if he likes to eat them.
From around 6-7 months of age providing testicular development was normal.
Good names for male Jack Russell Terriers: Jack Jacky Freddy Scooter Buddy Buster Rusty Sparky Eric Pat Owen Max Good names for female Jack Russell Terriers: Jill Kristie Maddie Molly Polly Patches Allie
The Jack Russell is a smaller version of a Fox terrrier. A Fox terrier is derived from a wolf. I belive they just kept breeding small-legged Fox terriers until they got the Jack Russell terrier.
He should be neutered if by the age of six months if he only has one testicle, as he could get cancer in the one that hasn't dropped. My Jack Russell has the same and that's what my vet told me.
I don't think they're trying to mate. That behavior is really a signal of dominance. The dog is letting the cat know that the dog is higher up in the "pack" than the cat. Our Jack Russell female does this with our male cat all the time. The cat doesn't mind, and it usually turns into playtime.
Parson Jack Russell's have longer legs and therefore can run faster
Unless the Jack Russell was bred with a Golden Retriever then no, it is not physically possible. If your Jack Russell has given birth to Golden Retriever puppies, then clearly, your dogs magic. The only solution.
it is spelled the same, "jack russell"