We had a beagle growing up that we never had spayed…..I think my parents were thinking about breeding her at some point when we got her, but it never happened, and she never got spayed. She got loose a few times, but she was so mean to every other dog, no boy dogs ever got close.
Anyway, long story short, she lived a very long happy life, but she finally passed away from what was explained to me as "tumors all over her girly parts." My parents and I decided that in the future, it would be best if we always got our dogs spayed from then on. It was kind of heartbreaking to know how much pain she was in, especially if she was never going to have the chance to use it for what it was intended. So, if you aren't going to breed her, why put her at risk?