“Australia should make it clear that they are as upset about one of their swimmers being caught for doping as they would be if the swimmer was Chinese.
“Australia has always been pretty firm about its opposition to doping but if the sauce is good for the goose it has to be good for the gander.
“If you are going to be holier than thou you should come to the discussion with clean hands.”
Jack, 20, who denies being a cheat, faces a four-year ban from swimming after testing positive to Ligandrol, a non-steroid anabolic agent popular with bodybuilders.
She will meet with the Australian Sports Anti-Doping Authority (ASADA) on Friday.
Pound said Swimming Australia had “fudged” its response to Jack’s positive result by allowing her to say she had withdrawn from competition in South Korea for “personal reasons”.
Pound said Australia now looked hypocritical given Horton’s public crusade against doping during the championships.
“It looks like you have been walking both sides of the fence,” he said.
After Jack revealed her positive result on Saturday, Swimming Australia chief executive Leigh Russell said the adverse result was “bitterly disappointing and embarrassing to our team, our sport and our country”.
“Our view is there is no place in our sport for performance enhancing drugs,” she said.
After initially refusing to comment on Jack’s positive test, Horton said: “I was disappointed to learn late yesterday that a fellow Dolphins team member had recently returned a positive A sample.
“I applaud the decision to immediately withdraw the athlete in question from further competition until this matter is resolved.”
Pound’s comments came a day after former WADA director-general David Howman called for ASADA to review the confidentiality policy that led to Jack’s positive result remaining secret for so long.
“Once there is a provisional suspension our policy is to name the athlete because of the rights of the other athletes to know who that person might be,” Howman, now chair of the International Association of Athletic Federation’s Athlete Integrity Unit, told The Herald and The Age.
Asked about Horton’s refusal to stand on the winners’ podium alongside Sun at Gwangju, Pound said: “As an athlete you are entitled to freedom speech, but there is a time and place.
“You have to balance free speech with your responsibilities as a competitor.
“If you win a medal you have an obligation to follow the ceremony protocol.”
Pound said he blamed international swimming federation FINA for failing to taking doping seriously enough.
“FINA has been in a constant state of denial about doping in swimming,” he said.
He cited the fact WADA was appealing FINA’s finding that Sun had not committed an anti-doping violation in 2018 when the swimmer and his team reportedly destroyed vials of his blood with a hammer.
“That indicates FINA has not been doing its job,” he said.
Matthew Knott a reporter for The Sydney Morning Herald and The Age based in the United States.