Iceland and Lidl said they had withdrawn affected products and were investigating the matter.
Kantar World-panel said only the discount supermarket chains Aldi and Lidl had shown stronger growth in 2012.
The result was that Lidl was handed a temporary ban on selling drink from its Victoria Road branch.
Police used the result in the Lidl case to ask Glasgow's Licensing Board to review the store's licence.
Kantar suggests the big risers were Aldi, with grocery receipts up 30%, Lidl up by 11% and Iceland up 10%.
Traces of both horse and pig DNA were found in value beefburgers sold in Iceland, Tesco, Aldi, Lidl and Dunnes Stores.
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The Lidl store in Victoria Road, Govanhill, was given the five-day ban after selling alcohol to a Strathclyde Police underage "test purchaser".
In Germany, department stores are still icons of the inner city, despite the success of suburban discounters, such as Lidl and Aldi.
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But in December 2005 a big retail customer, Lidl, cancelled its account.
Traces of both horse and pig DNA were also found in frozen value beefburgers sold by Iceland, Lidl and Aldi and Dunnes.
Lidl was not immediately available for comment when contacted by the BBC.
The difference is partly thanks to lower inflation on the Continent and a higher number of hard discounters like Germany's Aldi and Lidl.
Wal-Mart also faced well-established rivals in Germany, like Metro, and hard discounters such as Aldi and Lidl, already comfortable with razor-thin profit margins.
The long-running legal row began in February 2011 when police decided to test the Lidl store by sending a 16-year-old to attempt to buy alcohol.
Lidl was not available for comment when contacted by the BBC.
Last month, Irish food inspectors announced they had found horsemeat in some burgers stocked by a number of UK supermarket chains, including Tesco, Iceland and Lidl.
The contaminated food - some of which was also found to contain pig DNA - was on sale in Tesco, Iceland, Lidl, Aldi and Dunnes stores.
Appeal court judges have ruled Glasgow Licensing Board was wrong to suspend a Lidl store's drinks licence after it sold a bottle of wine to a teenager.
The scandal emerged in mid-January, when Irish food inspectors announced they had found traces of horsemeat in some frozen beefburgers stocked by UK supermarkets including Tesco, Iceland and Lidl.
The struggles of these companies and their brands are the fallout of the growth of private-label goods and the rise of hard discounters like Germany's Aldi and Lidl chains.
The horsemeat scandal emerged in mid-January, when Irish food inspectors announced they had found traces of horsemeat in some frozen beefburgers stocked by UK supermarkets including Tesco, Iceland and Lidl.
The burgers had been on sale in Tesco and Iceland in the UK and the Republic of Ireland, where they were also on sale in Dunnes Stores, Lidl and Aldi.
The controversy arose in mid-January when Irish food inspectors announced they had found horsemeat in some burgers stocked by a number of UK supermarket chains including Tesco, Iceland and Lidl.
Contaminated burgers had been on sale in Tesco and Iceland in the UK and the Republic of Ireland, where they were also on sale in Dunnes Stores, Lidl and Aldi.
Aldi and Lidl, two German discount chains which have won customers across Europe, are family businesses, as are Colruyt, a Belgian one, and Netto, a pan-European one which is owned by A.P.
The wider food contamination controversy arose in mid-January when Irish food inspectors announced they had found horsemeat in some burgers stocked by a number of UK supermarket chains including Tesco, Iceland and Lidl.
During the last years of his reign Mr Bernard focused on margins rather than sales volume while Leclerc and Auchan, its main domestic rivals, and deep-discounters such as Germany's Aldi and Lidl, cut prices to increase sales.
The scandal began in January when Irish food inspectors announced that they had found horsemeat in frozen beef burgers made by firms in Ireland and the UK, and sold by a number of UK supermarket chains, including Tesco, Iceland, Aldi and Lidl.
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