They will review the next steps with you. Some dogs get along with other pets with no problem. Others will chase the family cat. Some dogs need to be the only dog in the household. Again, this is very much a quality of individual dogs rather than all of one gender or the other.
Puppies are cute, but they require a lot of work the first six months.
With an older dog that period is behind them. An older dog lets you see more what kind of dog you will have. The size is more predictable. The disposition is known. Older dogs tend to be calmer.