The Colorado Bureau of Investigation has received inconclusive results in testing for the presence of human DNA on the toxic meatballs that poisoned at least three dogs at a Gunbarrel park last month.

While police still have no leads, nearly $5,000 has been donated by various sources, including TV host Aaron Harber, toward a reward for information leading to the arrest of whoever is responsible for placing the meatballs.

That reward is expected to grow Saturday, as the owner of one of the poisoned dogs has organized a fundraiser from 2 to 5 p.m. in Gunbarrel in an effort to get the pool up to $10,000 or more.

The event has more than 40 sponsors and will feature a raffle and silent auction, for which items have been donated by several local businesses, including the Daily Camera, KBCO, Chipotle, Avery Brewing Company, Whole Foods and Smashburger.

If you go

What: A fundraiser to increase the reward for information leading to the arrest of the party responsible for poisoning three dogs with toxic meatballs

When: 2 to 5 p.m. Saturday

Where: 5150 Buckingham Road, Gunbarrel

Cost: Free

Meanwhile, the three poisoned dogs —- a golden retriever puppy, a 6-year-old chocolate Labrador retriever and a 12-year-old beagle — are all in recovery and no longer thought to be in any serious danger.

The Boulder County Sheriff's Office Animal Control Unit learned last week that the toxic agent in the meatballs was brofidacoum, an active ingredient in the rat poison d-Con.

Contact Camera Staff Writer Alex Burness at 303-473-1389, burnessa@dailycamera.com or twitter.com/alex_burness.