The Australian television vet, who is best known for his role on Seven Network lifestyle show Better Homes and Gardens, said that he has been "happy" since splitting from Janine, his wife of 26 years.
Cooper has now moved from his historic farmhouse in Tasmania to a home on the mid-north coast of New South Wales.
He told Woman's Day magazine: "We are separated now. You get to the stage of your life when you drift apart - and for the past five or six years we've probably been going like that - so I thought, 'What's the point?' She wanted to stay there [in Tasmania] and I didn't."
Cooper and Janine got married in 1985, and are parents to a 25-year-old daughter named Heidi.
The reality star said that he is distracting himself from the split by campaigning for the welfare of animals, and recently celebrated his 68th birthday with his border collie Scarlett.
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