I have a select file on 4 pages in 1 of them works and in the other three does not respond to query

function recuperaRacas($idAnimal) {
        $idAnimal = strip_tags($idAnimal);
        $query = "select raca_id 'idRaca', raca 'raca' from raca_nimal where id_nimal = " .$idAnimal. " order by raca;";
        $queryBuscaRaca = $this->conexaoMysql->query($query);
        $queryBuscaRaca->execute();
        $listaRacas = array();
        while ($row = $queryBuscaRaca->fetch(PDO::FETCH_ASSOC)) {
            $listaRacas[] = array('idRaca' => utf8_encode($row["idRaca"]),
                'raca' => utf8_encode($row["raca"]));
        }
        return $listaRacas;
    }

// Model

// start controller

case 'buscaRaca':
        $idAnimal = strip_tags($_REQUEST['idAnimal']);
        $listaRacas = $Doacao->recuperaRacas($idAnimal);
        $html = "";
        foreach ($listaRacas as $raca) {
            $html .= "<option value='" . $raca['idRaca'] . "'>" . $raca['raca'] . "</option>";
        }
        echo $html;


        break;
    }

// end controller

// start view

<div class="col-xs-8">
                    <div class="form-group">
                        <label>Qual a raça?</label>
                        <select class="" id="raca" name="raca">
                            <option value="">Selecione uma opcao</option>
                            <?php foreach ($listaRacas as $raca): ?>
                                <?php if ($raca['idRaca'] == $raca['idRaca']): ?>
                                    <option selected="selected" value='<?= $raca['idRaca'] ?>'><?= $raca['raca'] ?></option>";
                                <?php else: ?>
                                    <option value='<?= $raca['idRaca'] ?>'><?= $raca['raca'] ?></option>";
                                <?php endif ?>
                            <?php endforeach ?>
                        </select>
                    </div>
                </div>


    $(document).ready(function () {
        if ($('#tipo_nimal').val() != "") {
            buscarRacas();
        }
    });

    function buscarRacas() {
        var idAnimal = $('#tipo_nimal').val();
        $.ajax({
            url: '../Controller/DoacaoController.php',
            type: 'POST',
            dataType: 'html',
            data: {action: 'buscaRaca', idAnimal: idAnimal},
            success: function (data) {
                $('#raca').empty().append(data);
            }
        });

    }


//

I wanted to remember that I am using the same codes for the 4 pages, can that give anything? or should the popular select us in 4?