Big brainstorm on veterinarian websites
For example, you may ask to have have a local pet grooming business that has a website if that you can market your products and services on their site too. You then allow them to market their products on your own website or in your clinic. You can ask them to send their clients to you and you can send your clients to them. For such veterinary marketing to work you should only trade with other businesses that would be associated with animal products or services. This is one way your marketing efforts can be easily expanded.