It constantly spams the log in MP with:

java.lang.ClassCastException: com.google.common.base.Absent cannot be cast to java.lang.Integer
    at sophisticated_wolves.entity.EntitySophisticatedWolf.getSpecies()

Could you please post here your minecraft version and mod version?

Oops, MC 1.10.2 and 3.6.5

Unfortunately I can't reproduce this issue, like your another bug report( #14) .
I just can suggest that this is a result of some kind of compatibility issue, or, maybe data corruption(or both of them together).