"Alfred's dog" is not an official name.
Alfred's dog
Animal Dog
Residence Alfred's house
Family Alfred (owner)
Cartoon debut "The Contest" (mentioned only)
Alfred's dog is the dog of Alfred. He has only been mentioned once, by Francine, she commented that if Alfred was a mouse that the dog would eat him. Arthur corrected her by saying that Alfred isn't a mouse and he doesn't know what he is.