"Rudy isn't seeking fame; he's seeking sanity," Schwartz said. "If he can cause just a few people to realize the pointlessness of worshipping at the altar of Socks, he will be satisfied."
Most other pets on Twitter have humbler aspirations.
Christian Santiago, a 30-year-old New Yorker, said he and his wife started an account for their 5-year-old French bulldog as a joke.
"A few members of our family and friends had gotten to know Miss Piglet and wanted to see what she was up to," he said.
On Twitter, she ruminates about other dogs in the neighborhood, her favorite foods and, perhaps unfortunately, her bodily functions.
"i got a taste of freedom this weekend and loved it. what is up with this leash business anyway?!?," said one post.
"hmmmmmm, rawhides make my poops smaller," said another.
A number of pets on Twitter are using their social media connections to raise cash for animals in need.
Once a month, animal lovers around the world gather online for a round-the-clock virtual "PawPawty" to raise money for animal charities. Posing as their pets, people exchange messages and pictures on Twitter with other animal tweeters, using the hashtag #pawpawty to indicate their "attendance."
An official DJ tweets out a link to an online playlist so that all party animals can listen to the same song while they're on the Internet, and a security dog even monitors the party to help newcomers and keep spammers away.
Each month, a different charity and theme are chosen. and attendees are encouraged to contribute any amount to the featured charity while the 24-hour party rages around the world.
Since its first PawPawty last March, the "anipals" have raised more than $25,000 for philanthropic groups all over the world.
"I had no idea it was going to get as big as it did or has," said Lynn Haigh, the lead PawPawty organizer. About 20 people took part in the first "pawty," she said, but now 300 to 400 people join the party over the 24 hours.
Haigh, a 44-year-old project manager near Oakham, U.K., said she organized the first party soon after joining Twitter as her Cairn terrier Dougal. This week, she could win a "Shorty Award," for best nonprofit on Twitter.
Tweeting as her 6-year-old Persian cat Romeo, Caroline Golon, 39, who works in public relations in Charlotte, N.C., has raised more than $35,000 for animal charities. Every month, she chooses a different charity and every other month partners with PawPawty.
She said the animal community online -- on Twitter and beyond -- is a welcoming, supportive group. Twitter efforts like hers and Haigh's put that passion to good use.
"They want to do something. They want to be a part of it but they don't know what to do exactly," she said. "This gives them an opportunity to jump on board and do something that means a lot to them."