Hi Joanne,

Most vets would recommend neutering at 6 months.

There was a recent study that looked at the risk of cruciate ligament rupture and age of neutering and they found that the risk was decreased if the neutering occurred at 12 months rather than 6. I looked at this study closely and feel it wasn’t too reliable, but more so, it was really for large breed dogs and not smaller breeds like French Bulldogs.

Neutering is a personal decision.  There are some negative behaviors that can development in dogs that are not neutered but keep in mind that they can be trained out of them if necessary.  Neutering earlier than 12-14 months will mildly decrease their full growth potential.  Neutering will eliminate the risk of testicular cancer in the future and greatly reduce the risks of many prostate diseases later in life.

Here’s my recommendation. It’s fine to wait until 12 months. I would do it sooner if any undesirable behaviors start to develop like humping, aggression or urinating in the house.

I hope this helps!

Dr. Clayton Greenway