[Help] Breeding 101 ?

So guys, what's the basics of breeding? My family has Chihuahua and recently she got sick and made us worried that if she has Gone we would be terribly sad and empty in our home... So we lately thinking of breeding her, but some says purebred is bad some says it good... Any advice welcome, thanks.ps: she's healthy and happy now. via /r/dogs http://ift.tt/2rXm6Jq