MIDDLETON, Wis. -- Some dog owners are furious that a dangerous dog, which was court ordered to be leashed and muzzled, was allowed to roam freely at a Middleton dog park.

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That dog, a Bull Mastiff, attacked a 10-pound Bedlington Terrier and mauled it to death on Tuesday night right in front of its owner and other dog walkers.

"You can't even imagine what it was like," said Shirley Fulton. "I watched my dog be eaten by another dog."

Fulton said she had taken her three Bedlington Terriors to the dog park for some fun and exercise. She was walking with Jacquie Piraino and her Peekapoo when the attack happened.

"As we were walking in the dog park we saw a huge mastiff assume an aggressive position so we stopped walking and stood about 40 feet away," said Piraino.

Piraino said she and Fulton attempted to stand in front of their small dogs, but she said the Mastiff lunged right through the middle and grabbed the smallest, Lily.

Police said the Bull Mastiff outweighed the tiny dog by more than 100 pounds.

"I'm screaming," said Piraino. "Shirley was hitting it with a stick, I got out a leash and was whopping it in the face trying to get the dog out of its mouth."

Piraino said the Mastiff's owner was much further down another path.

"I'm yelling at him, 'Get your dog's mouth open,'" said Piraino. "Finally, he did and there she dropped. She was so mangled."

Lily didn't survive the mauling.

"The dog had a history of biting a person," said Middleton police Lt. Chuck Foulke. "As the people were trying to intervene in the dog attack, it's pretty lucky that someone wasn't bitten."

Witnesses did write down the license plate number of the Mastiff's owner and police tracked him down.

Foulke said they've been called there before.

"We've had a history of dog incidents with this man before," said Foulke.

According to police, the man was cited in 2006 when the Bull Mastiff bit a woman. He was cited again in 2007 when the Bull Mastiff bit another dog as it was walking by with its owner.

"We impounded the dog then, but released it back to its owner under the provisions that whenever the dog was outside of his residence that it had to be muzzled and on a leash," said Foulke.

"It wasn't leashed and muzzled," said Piraino. "It wasn't even with its owner. His owner was down the path a different direction."

When the chaos subsided, Piraino began looking for her own small dog.

"So somewhere in there she ran away," said Piraino. "She must have been terrified."

Piraino has spent the past two days searching for her 14-pound Peekapoo she calls Sahara.

The dog was spotted once on Wednesday morning near Christina Park.

"She was so timid that when they came out of their house she freaked and ran away again," said Piraino.

Piraino is now asking for the public's help in finding her pup.

"I used to think all dogs were wonderful, Sahara did too," said Piraino. "Now we both know differently."

Police said the bull mastiff was impounded at a local veterinarian's office, but was so aggressive it had to be moved to the Humane Society.

Police have requested a court order to put the dog down. The Mastiff's owner is appealing that decision.

"I love dogs as much as the next person, but some dog owners aren't responsible enough to have dogs like this and we believe this person can't control this dog and that's a danger to other dogs and the community," Foulke.

Anyone who sees Piraino's lost dog is asked to call 608-215-7142. The dog is friendly and answers to the name Sahara.