Ronnie is usually a big piggy, scavagin & always hungry etc...well..last couple of days he will eat breakfast & dinner but is not interested in treats, pigs ears, toast with jam (usually his fave) he just walks off? other day gave him pigs ear, thought it had gone & was pleased he was eating again, then found it hidden behind cushion on sofa...do you think he's ok? he was wormed 2 weeks ago