Final answer:
The term "spliced-together" in the sentence refers to the fact that the dog's name is a combination of different parts or elements.
Step-by-step explanation:
In the sentence, "These dogs' signature is a wacky, spliced-together name that provides a clue to the dog's mixed parentage," the term "spliced-together" most likely refers to the fact that the dog's name is a combination of different parts or elements. It suggests that the name is a fusion or combination of different names.