The Humane Society of the High Plains is contributing $1,000 to the reward fund asking for information leading to the arrest and conviction of the person responsible for poisoning three dogs west of Hays.

The contribution, announced Friday by board treasurer Marilyn Marshall, boosted the size of the reward to $6,000.

The Humane Society of the United States already had pledged $5,000 as a reward.

The growing reward fund stems from the poisoning of three dogs -- two labrador retrievers and a chihuahua -- owned by two families living in the Prairie Acres housing development west of Hays.

The dogs apparently were poisoned with strychnine.

Marshall said the board voted Wednesday to add $1,000 to the reward fund, hopeful it might be enough to prompt someone to come forward with information leading to the arrest and conviction of the person responsible.

While the Hays humane society is concerned about the welfare of pets, Marshall said it goes beyond that.

"We're also concerned about any children or people who might get into that stuff," she said.

Board members decided to add money to the reward fund on their own.

Marshall said she's not been in contact with the animal owners.

"We felt like, since it's local, that we ought to do what we could," she said. "We've all been just horrified about it. We thought we could do something as a community service."

Marshall said she notified the sheriff's office about the additional reward money.

All three dogs that were poisoned were taken to Steve Mosier's veterinary clinic, who suspected strychnine poisoning. Mosier took samples and confirmed the cause.

He then contacted the Ellis County Sheriff's office.