A predator parasite study conducted by the University of Calgary in Nose Hill Park is catching some heat from dog owners.

The study uses a form of padded leg-hold trap to live trap coyotes without injury so researchers can take samples and evaluate their health.

The traps are set in deep bush between 8:00 p.m. and 6:30 a.m. in the on-leash portions of the park.  There are three sets of warning signs including one next to the actual trap.

Some dog owners are upset the signage isn't more explicit in describing the traps and the potential risk to pets.

The study was approved by both the University Ethics Committee and the City of Calgary but traps were dismantled Friday afternoon while researchers and the city review the public concerns.