Just in time for Easter.

A hopping mad Brooklyn bunny hoarder was hauled into court Friday on charges of keeping 176 of the critters in a filthy junkyard — and on the way out she served a bizarre $2 billion lawsuit on the animal-rights activist who ratted her out.

Dorota Trec, 35, accused “furiously jealous” Big Apple Bunnies founder Natalie Reeves, 41, of “dreaming that she has control over the whole rabbit world in New York City,” the new court papers state.

“In her smear campaign, Reeves refuses to acknowledge Dorota Trec’s extensive achievements with rabbits and how wonderful for the community the rabbit project is.”

But prosecutors said Trec kept her pets in such awful conditions that they suffered from diseases like syphilis and had bite wounds all over their bodies.

She was hit with two animal-cruelty charges and faces up to a year in jail.

Reeves, a Tribeca lawyer, was slapped with the suit as she left Trec’s arraignment in Brooklyn Criminal Court. An elderly man accompanying Trec threw the papers into Reeves’ arms and yelled, “You’ve been served!”

“Happy Easter to me!” Reeves quipped to The Post. “This lawsuit is not what I wanted the Easter Bunny to bring me in his basket.”

Trec was arrested last month after the cottontails were taken away by the ASPCA in two January raids. Assistant District Attorney Mary Monahan demanded she either pay for the pricey care or sign over ownership to the city.

“There are over 170 rabbits the city has in possession. This has cost the city over $40,000 to date,” Monahan said.

Trec’s lawsuit — which was filed Thursday in Brooklyn Supreme Court — seeks more than $2 billion in damages and also names the NYPD, the ASPCA and Brooklyn DA Kenneth Thompson as defendants. She accuses them of causing “loss of reputation, shame, mortification and hurt feelings [and] temporary loss of rabbits.”

She accuses Reeves of wrongful arrest, trespassing, defamation, harassment and wrongful seizure.

Reeves had cautioned parents from buying Easter bunnies for their kids this year unless they can provide proper care.

“If you are going to get a rabbit around Easter time, you have to know how to take care of them. Otherwise you could end up with a situation like this, with rabbits living like trash in a junkyard,” said Reeves.

Trec declined to comment after court except to say that Reeves and the other bunny lovers were on a “witch hunt” against her.