Not sure what you are asking, number of dogs in the field at the same time or number of dogs owned? I'm 57 and will run up to three or four dogs at a time in pheasant country. When grouse hunting only run one dog at a time. I currently have 4 dogs.
I’m 73 and while I only hunt one dog at a time I had 4 working dogs this season. Now mostly retired I can hunt more and need more due to an extended season and injuries. When I was working and only got to hunt a couple weeks a year 2 was fine.