"But they were spending less, and certainly being cautious with purchasing on credit," he said.
"From a consumer point of view, there's just a lack of confidence [in Australia] at the moment."
In the trading update the company said same-store sales across the Tasman had fallen 0.5 per cent during the six months to December 31, to $177 million.
Conversely, same-store sales saw "solid" growth in New Zealand, Canada and the United States.
American retailers had a bumper 2011, although sales dipped last month, according to US Government figures just released.
Total retail sales in the US reached a record US$4.7 trillion, a rise of almost 8 per cent on 2010 and the biggest percentage increase in 13 years.
But Parsell said the situation in Australia was a concern.
"Really, the challenge for us is how we stimulate [Australian] consumers to continue to purchase our products," he said.
He said Michael Hill, which will release its full half-year result on February 16, would place special focus on giving customers a good experience in its Australian stores.
"We have to ensure that we're providing the products at the price-points that people want."
But he said extra discounting would not be a strategy used to deal with tightening consumer spending across the Tasman.
"I don't think it's about cutting prices - it's more about creating value and demand and inspiring people to buy your products."
Parsell said half-year profit, despite the impact of margin pressure in Australia, was still expected to be up on the prior comparable period.
"We're still in pretty good shape."
Half-year earnings before interest and tax were expected to be in the range of $33 million to $35 million, compared with $32.3 million in the corresponding period last year, the company said in its trading update.
Michael Hill shares closed down 4.49 per cent, or 4c, at 85c on Friday.
A trading update released by Kathmandu just before Christmas - which revealed lower than expected festive season sales, particularly in Australia - prompted a more than 25 per cent drop in the outdoor apparel retailer's shares, which are listed on both sides of the Tasman.
Risk-averse Aussie investors have been dumping retail stocks that show any signs of danger.
Shares in ASX-listed surfwear retailer Billabong shed more than half their value in December after the company revealed first-half profit may fall as much as 26 per cent.
And JB Hi-Fi stock, also listed on the ASX, took a big tumble after the electronics retailer issued a pre-Christmas downgrade.