Lead in catch dogs

I try to tote a bulldog at all times unless the property owners don't let us and where I send one from usually depends on the dog's I'm running.If I'm running my rough dog's that catch I turn the bulldog loose as soon as he hears the fight 99%of the time he's not even needed but I like the insurance policy of a bulldog on the ear especially if I have kids with me.If I am running looser baying dog's I try to get as close as possible within 100yds usually the closer the better.In the winter months I don't mind running one catch dog loose with my rough dog's but I know that ain't for everyone.