Size in breeding

Question
5 lb stud + 5/5.5/6 lb bitch = FINE
4 lb stud + 4/4.5/5/5.5/6 lb bitch = FINE
2/3/3.5 stud + 4/4.5/5/5.5/6 lb bitch = FINE

6 lb stud + 4 lb bitch = BAD
4 lb stud + 3/3.5 lb bitch = BAD
2 lb stud + 2 lb bitch = BAD

So with that saying, it is not good idea when it comes to breeding a small bitch with a large stud because it will be a c-section...but however, my question is:

HOW ABOUT BREEDING A SMALL STUD TO A LARGE BITCH?

3.5 lb stud + 6.5/7/7.5/8/8.5/9 lb bitch = ?

*3.5 pounds male (his parents weighed 5-4 1/2 lb each) breeds to 9 pounds female (her parents weighed 5-4 1/2 lb each)

*IS IT STILL C-SECTION BECAUSE OF DEPENDING ON HOW BIG BITCH IS WHEN IT COMES TO CARRYING MANY PUPPIES? OR IS IT BECAUSE IT HAS NOTHING TO DO WITH THE SIZING BUT THE GENE, ITSELF? DO YOU BELIEVE IN A C-SECTION GENE?

If a mom dog delivered the female puppy via c-section then does it means the female puppy will guarantee have a c-section when it gets older?

I've heard it is not okay to breed a small bitch because of the c-section but then again, I've heard a large bitch still can have a c-section. That is where I am confused.

I am thinking to myself, if it is not good idea to breed a tiny size bitch then it is better if I use a large bitch but then does it means I am trying to avoid the c-section or am I realizing that it does not matter?

When it comes to the AKC standard, 2-6 lb but that is for SHOWING only and it has nothing to do with the BREEDING STANDARD. Now the real QUESTION is, "AVERAGE BITCH (4-6 lb) OR LARGE BITCH (6+ lb)?"

Oh and one more thing, is it more of STUD SIZE and not based on the bitch size?

SORRY FOR MANY QUESTIONS!

Answer
Hi Billy - Ray

Only problem with your math is that males tend to be larger in most breeds and genetics plays a big part of selection. However a 30lb female + 150lb male = BAD but if you're talking a few pounds it's not that extreme or harmful.


A large female can still have complications whelping a small males litter.  Depending on again, the genetics in the background, the breed, if puppy 3 in utero wants to be born before puppy 1 and so on.

I do not believe there is a gene for c-sections.  I had lines of females who have never required section but a great grand daughter did because the end pup had detached and threatened the entire litter.  And I've had a female section who's off-spring were free whelpers.  

I believe your questions are breed specific but you didn't mention the breed. Again a small Terrier can easily whelp a larger male when a Great Dane would require a section.  It's all relative.