pigeon/horse etc fancier
From Longman Dictionary of Contemporary Englishpigeon/horse etc fancierpigeon/horse etc fancierDLHsomeone who breeds or is interested in a particular kind of animal or plant → fancierExamples from the Corpuspigeon/horse etc fancier• Robert is a pigeon fancier and a member of the Johnstone Social Flying Club.• Although this usage has almost disappeared, it is still visible in pigeon fanciers.