Almost a quarter of retired greyhounds surrendered to the Queensland racing watchdog's adoption program have been euthanased in the past year, because their behaviour made them too unsafe to be rehomed.

In its annual report to Parliament, the Queensland Racing Integrity Commission [QRIC] said its staff have euthanased 101 retired greyhounds since taking over the state's greyhound adoption program a year ago.

QRIC director of animal welfare Martin Lenz admitted the number was higher than he would like.

"It's something that we're looking to reduce over time," he said.

Another 318 dogs surrendered to the adoption program in the past financial year were rehomed.

QRIC said most of the greyhounds put down by its staff showed unmanageably high prey drive as well as health issues and extreme fear and anxiousness.

Mr Lenz said there was no choice but to euthanase unsafe dogs.

"If a greyhound recognises everything that's smaller than it and furry as prey, that makes it quite difficult to place it in situation where there may be other family pets," he said.

The QRIC could enact a pre-screening program to monitor dog temperament. ( ABC )

"When a dog leaves the program, it is an expectation in the community that it is safe."

The greyhound adoption centre at Churchable in the Lockyer Valley has operated for several years, but the QRIC took it over last year in the wake of the live-baiting scandal exposed by the ABC's Four Corners program in 2015.

The number of dogs given to the centre increased by 300 per cent after Four Corners ran footage of live-baiting tactics used by trainers.

QRIC's annual report showed it spent $1.1 million on animal welfare in the year to June 2017, mostly associated with the adoption program.

Mr Lenz said in response to the high number of dogs euthanased in its first year, QRIC was trying to educate trainers and breeders about how to better prepare their greyhounds to cope with life as a pet.

He said the commission was considering a pre-screening program that could monitor a dog's temperament early in its racing career.

"Then the focus is back on the trainer to make sure that the dogs are brought up in a way that maximises their success on the race track ... but also when they finish that racing career they are in a state that is suitable for us to place them safely," Mr Lenz said.

The ABC contacted the Queensland Greyhound Breeders Owner and Trainers Association for comment.