Be cautious about excerpting out of context... remember the warning that these were not cast in stone, just generally accepted guidlines for breeding purposes.
For example, if the males are kept separate, then you can have as many as you wish. In fact it's thought to be beneficial if you have...
Will the small guys try to mate the big girls? Yes.
Will the big guys try to mate the little girls? Yes.
That is what they do; they dont know any different.
Here's the rule of thumb on male:female ratios:
For medium breeds, it's one male for every 10 females.
For small breeds, it's one male...