"The vet examined him [yesterday] and the X-ray showed there is a lot of movement around his fetlocks. It's a maturity thing and he's still growing.
"He will have three months out at The Oaks Stud and all going well he could be back racing in the mid to late autumn.
"It's a shame what happened, but at the end of the day, we've still got a horse."
There was pre-race confidence in the Catalyst camp he would produce a bold fresh-up effort in the Shorts and Boss shared that feeling.
"Bossy said he went down super in his preliminary and he was good in the running, but as soon as he let him go, there was nothing there," Chipperfield said.
"That's not him. Usually when you let him go he explodes.
"Sure he got the interference, but he was gone before that and Bossy just eased him right down."
It's the second time Catalyst has required a veterinary examination after a below-par run in Australia.
Following his brave second to Alligator Blood in his Australian debut in the Group 3 CS Hayes (1400m) at Flemington last February he finished sixth in the Group 1 Australian Guineas (1600m) and was later found to be suffering from bruised fetlocks.
"He's a late November foal and not even four yet, so it's still all in front of him," Chipperfield said. "We've just got to put it all down to his immaturity."
Though Catalyst didn't shine in Sydney, Chipperfield did have some reason to celebrate on the home front last Saturday when Desert Mirage, a four-year-old mare he now races in partnership with The Oaks Stud, scored a hard-fought win in the final event at Ruakaka.
"Coming around the bend I thought she was struggling, but she dug deep and won well," Chipperfield said. "She's only had the two starts since I've been a part-owner and she's won them both.
"I'd like to take her down for the Rating 74 1600m at Hastings [on October 3] and later look to step her up over ground. We know she can handle it as she ran seventh in the New Zealand Oaks [Group 1, 2400m] and she was still immature. She's fully developed now and stronger."
Chipperfield's interest this weekend will be divided between Ellerslie and New Plymouth. He plans to start London Bound (a last-start winner at Taupo) at Ellerslie and will send the five-race winner Obsessive down to Taranaki for an open 1800m.
- NZ Racing Desk