Put the any dog names and press the search button. Simple enough. If the dog name is long, you can enter the first few letters. You will still find the dog name.
By clicking on any letter, you will be getting long list of dog names. It starts with the letter that you click.
When you search for any dog names, you will probably get a long list. So, the long list may be divided into several pages. Just click on next or previous link to go from one page to another page. Additionally, the result are nicely sorted by dog names. So, it is easier to find the dog name.