It's tricky to say definitively which animal is the most dominant in a temperate deciduous forest as "dominance" can be interpreted in different ways. It could refer to:

* Population size: In this case, it might be deer or squirrels, which are both abundant in many deciduous forests.

* Influence on the ecosystem: Here, wolves or bears could be argued as dominant due to their impact on prey populations and overall forest structure.

* Top predator: Again, wolves or bears fit this definition, as they are often at the top of the food chain.

* Economic importance: This could be deer or squirrels depending on the region and how they are managed.

Ultimately, the "most dominant" animal will depend on your specific definition of dominance.

It's important to remember that each species plays a vital role in maintaining the balance of the ecosystem.