I have a question about my jack/chi...?

I have a 5 mo. old jack/chi mix named Eddie. He has recently been diagnosed with luxating patella in his hind leg. While his condition is treatable, I'm wondering what other little medical gifts might be in store for me. I'm not asking for a psychic reading, just interested in potential problems that might come from breeding a jack and chi. Has anyone out there dealt with these little guys? I'll work closely with my vet, and I realize every dog is different, but I'd like to hear your feedback...thanks in advance.