My Standard Poodle would have the excited and confident delivery of an Anime Hero. The mid 70s sort of robot pilot.
Pugsly, my scruffy little terrier-mix would sound like an irritated Jean Reno.
Witnesses.
Never kiss an animal that can lick its own butt.
You a ventriloquist? 
I have two cats. They talk like Patty and Selma. They agree with each other with a smug “mmmmm-hmmmm”
Haha, I always use that silly Butters voice when I talk to cats, and in my mind they’d answer me in a Bill Murray in Caddyshack-meets-Lorenzo Music as Garfield voice.
Lou:
“Well well well, there ain’t nothing in the world I like more than a little cat! Mew mew mew!”
Cat:
“He feeds me, so I have that going for me. Which is nice.”
My cat sounds like Marge - she does the “mmmmmmmmm” disapproving sound all the time, but mostly when she has to come in from the back porch.
Our dog would sound like that dopey baby vulture in one of the older Bugs Bunny cartoons - “Nope, nope, nope.”
I know exactly what our Jack Russell would sound like, because my husband speaks for her. I guess he’s clairvoyant.
The scary thing is that sometimes my daughter or I get involved in a conversation with the dog voice. Meanwhile the dog is probably thinking, what is wrong with these people? Why won’t they shut up and let me sleep!
My dog Herbie sounds like Patrick from Spongebob Squarepants. “The water from the toliet is good, Momma!”
Cool thread.
We always say our lil’ girl would have the same attitude and way of speaking as the baby on The Family Guy. She gives us these looks sometimes that totally remind me of Stewie. I can just hear her complaining and plotting against us “vile” humans. (wrong gender character, but oh well). 