Jessie Anne's official first word is dog. She can say Nacho too (seriously, she knows which dog is Nacho). It comes out very exaggerated, like Naaacho with the emphasis on the cho. She makes it sound like an achoo almost. She can't name the other ones yet and when we try to teach her, this is how the conversation goes:

Jenn: Nissiiii
Jessie: Dog
Jenn: Nissiiii
Jessie: Dog
Jenn: Nissiiii
Jessie: Dog

This can go on for as long as you have the patience to allow it. The exact same thing happens with Cadi.