You hear about "single reason to change" when it comes to the scope of a class and how big to make it. However, my client repository I feel contains client-only methods that doesn't make sense for me to put elsewhere. Should I be creating many classes/repositories for the sake of thin classes?

Is my interface too big? Thanks!

interface ClientRepositoryInterface {

	public function find($client_id);
	public function update($client_id, $data);
	public function setPreferredWalker($client_id, $preferred_walker_id);
	public function setCashClient ($client_id, $is_cash_client);
	public function isCashClient ($client_id);
	public function setServicesRequested($client_id, $servicesRequested, $serviceRates, $serviceRateAdds);
	public function makePayment($client_id, $amount, $date, $paymentMethod, $invoice=Null);
	public function getBalance($client_id);
	public function newClient($data, $servicesRequested, $serviceRates, $serviceRateAdds, $serviceTypes);
	public function getPets($client_id);
	public function getName($client_id);
	public function getAddress($client_id);
	public function getDogWalkerName($client_id);
	public function getContacts($client_id);
	public function hasServicesToInvoice ($client_id);
	public function getServicesToInvoice($client_id);
	public function getAmountToInvoice( $client_id );
}