They often have 5 puppies.
How Many Puppies Do Jack Chi Have?
Since it's a Jack Russell/Chihuahua mix (I think, easier for you to just call it what it is and much less confusing and misleading) there isn't even an average or predictability like there is with purebreds for anything. Do you know what the sire(s) are? You would get an idea during your standard prenatal care. There is a run down and some basic info and lots more links in the first link.
q3525724.html#a2810229 http://www.therealjackrussell.com/index.php http://www.chihuahuaclubofamerica.com/ http://www.petfinder.com/index.html
http://home.comcast.net/~NoPuppyMillsVA/Poo-dogs___Designer_Mutts/poo-dogs___designer_mutts.html
http://www.learntobreed.com/mutts.html
http://www.wildheirlabradorrescue.org/readingroom/what-is-a-back-yard-breeder.php
http://members.tripod.com/antique_fcr/goodbreeder.html
q3525724.html#a2810229 http://www.therealjackrussell.com/index.php http://www.chihuahuaclubofamerica.com/ http://www.petfinder.com/index.html
http://home.comcast.net/~NoPuppyMillsVA/Poo-dogs___Designer_Mutts/poo-dogs___designer_mutts.html
http://www.learntobreed.com/mutts.html
http://www.wildheirlabradorrescue.org/readingroom/what-is-a-back-yard-breeder.php
http://members.tripod.com/antique_fcr/goodbreeder.html