If you watch a number of these Tweety and Sylvester cartoons you'll notice the two stars with different owners. "Granny" is the usual owner of Tweetie, but not always. Here, in this cartoon we see a woman who already owns Sylvester, taking in Tweetie whom she thinks is an abandoned bird. She calls our cat here "Thomas," too, and she's a nasty woman. She would be reported for animal abuse, in this day and age, as she constantly beats Sylvester with a broom.
This gets off to a good start as Tweetie is outside freezing in the show. Sylvester is hidden inside a snow man waiting for the right time. That comes along quickly and Sylvester jumps out, puts on his snow shoes and starts stalking the little bird. When he pounces, he grabs the little heater that Tweety was using to get warm, instead of the bird. A second try succeeds, but the cat's owner comes out and demands to know what he's hiding inside his paws. She winds up taking in the bird.
The rest of the cartoon is the standard material of the cat trying to catch the bird who is in his cage way up in the ceiling.
This was passable but I didn't care for the beatings "Thomas" took from the owner. I understand this was the first pairing of the two main characters, so it explains why we see different names and different owners. I'm glad "Granny" took over from this woman and Sylvester didn't have to hang around this house for too long.