* Deer don't have "deers". "Deer" is a general term for a type of animal. We talk about individual deer (like a buck or a doe).
* "Have" is unclear. Are you asking how many offspring a deer can have? Or how many other deer might be in a herd?
Here's some information to help you understand:
* Offspring: Female deer (does) typically give birth to 1-3 fawns each year.
* Herd Size: Deer live in herds, but the number of deer in a herd varies greatly depending on factors like habitat, food availability, and predators.
Let me know if you have a more specific question, and I'll be happy to help!