Some breeds have health problems because of design. The pushed in face breed who have breathing problems because they have been bred for flatter faces is one such health problem. If you breed two very flat faced breeds together the fact that it is a mixed breed will not help the problem. It is a design flaw.
A number of the toy dogs have fragile bone problems. If you breed two different toy breeds together this will not make the problem go away necessarily.
Instead of having a healthier dog a mixed breed may end up with the problems of both it's parents.
“The pushed in face breed who have breathing problems because they have been bred for flatter faces is one such health problem.”
Our Pug lasted 16 years.
Miss him every single day.
L