I Taw a Putty Tat 1948

Woman wonders why her little pet birds keep disappearing. Sylvester the cat knows, but other than burping feathers, he's not saying. But it looks like he's met his match when the woman orders another bird from the pet shop: a little yellow canary named "Tweety".

Cast:

Mel Blanc
Sylvester / Tweety / Bulldog (voice) 

Bea Benaderet
Woman (voice) (uncredited)