Hilary Duff’s Dog ‘Doing Great’ After Brain Surgery

Hilary Duff (inset) and dog Lola

Courtesy Hilary Duff; Inset: Abaca

updated 02/09/2012 AT 12:00 PM ET

originally published 02/09/2012 AT 2:00 PM ET

Hilary Duff can rest easy now – all of her babies are healthy and happy.

The mom-to-be announced Wednesday that her beloved dog Lola, who fell ill before Christmas and underwent major surgery to treat a mystery condition, is recovering nicely.

“Update! Lola was having terrible seizures. She had a shunt put in her [skull] to drain fluid off her brain and now is doing great,” she shared on Twitter, posting a photo of the 6-year-old Chihuahua looking well.

In December, Duff was spotted crying outside a veterinary office where Lola was being treated. “Could everyone please say a prayer for my pup Lola, she has surgery in a half hour!” she wrote at the time. “She’s a strong girl but needs all good energy sent her way.”

Lola was absent when Duff and husband Mike Comrie were spotted taking their pack to a dog run last month, but the singer let her fans know the pooch was just sitting that one out.

“She is recovering like a rock star,” Duff – who’s expecting a baby boy in March – shared. “So grateful.”

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