Princess Anne has said that gassing badgers would be the most humane way to cull the animals.
The Government is considering introducing gassing after a report said that shooting badgers would not bring their numbers down enough to stop them spreading tuberculosis in cattle.
"Most of the people who did it in the past will tell you that gas is a much nicer way of doing it, if that's not a silly expression," she told BBC One's Countryfile.
"How it works is that you go to sleep, basically."
The royal owns a heard of around 30 cattle and has lost 15 rare white park cows to bovine tuberculosis in the last two years.
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Results of the European Parliament elections are on the fronts.
Turnout was at a two-decade high for ballots across all 28 European Union countries.
MP Caroline Lucas has hailed the strong result in England and Wales as part of a ‘green wave sweeping across the EU’.