These two pet dogs amused their owners as they fought constantly - but only behind the safety of their kennel bars.<br /><br />Footage shows the bickering mutts Dollar and Euro, both 2, snarling at each other while inside their cages at home in Tak province, Thailand, on September 1.<br /><br />The pair appeared ready to rip each other apart, but hilariously became friendly when they stepped out of their kennel to play with a squeaky toy with their owner.<br /><br />Fur mum Toeii Wannasopha said: 'They used to fight a lot, but they've mellowed out. These days, they only argue this way - behind the cage bars with no one getting hurt.'<br /><br />