Are you allowed to compete (not just train) in racing or lure course with a neutered dog or spayed bitch ?
In France you are not suppose to, but what about the USA, Finland, Australia, Sweden, Norway, Danemark…...?
Yes, absolutely in the US. It is soo much easier..the boys are less likely to follow the girls, and since the girls can't run with they are in season, you can race any time of year.
Take it REALLY REALLY slowly. Be sure to make good things happen when they are together and getting along. It took me 7 months to get my 4 yr old basenji rescue (who has a very high prey drive) to coexist with an old cat. If there is a bad experience, it can set everything back months, so be very careful to set up good experiences and avoid bad experiences.
Normally the clubs have practices after the Saturday trials. Unfortunately none of the clubs in our area have separate practice days. You might also think about going to some of the lira meets for straight run practices. The schedule is at lgra.org