BROOMFIELD, COLORADO — Police in Broomfield, Colorado are investigating incidents in which a family's dogs were sickened by methamphetamine-laced hot dogs placed in their backyard over several months. Investigators believe someone is deliberately targeting the family's dogs with methamphetamine-laced hot dogs since November, according to Broomfield police.

On two occasions, the family's dogs ingested methamphetamine-laced hot dogs placed in the yard and became sick, police said. Police said the substance in the hot dog tested positive for methamphetamine.

Jillian Frank said her vegetarian mother found a hot dog on her patio in Broomfield and cracked it open. Frank said the family initially considered the incident a random act of animal cruelty.

A second incident occurred on December 26. Frank said she noticed her dog Gable acting strangely after he ate something from the yard. She said she took Gable to a veterinarian, and a test on Gable came back positive for methamphetamine.

The most recent incident occurred on March 22, according to Broomfield police. The March 22 incident involved Annalyn Frank and her dog Murray.

Annalyn Frank said she noticed Murray spinning in circles and foaming at the mouth. She said she took Murray to a veterinarian, and a urinary test on Murray tested positive for methamphetamine and MDMA.

The family and police do not know why anyone targeted the dogs. "We just kind of assumed this was a random, malicious act of animal cruelty," Jillian Frank said. "She has no enemies or conflict. She doesn't have any neighbor conflicts."

The family installed security cameras around their home and high netting along the fence. Jillian Frank and Annalyn Frank said their mother plans to move out.