Hi Rusty,Crazytalk is the perfect tool for this job. With the new Crazytalk 5 face profiles you can animate any face shape you can think of.
To do this you will need a good quality photo of the greyhound to bring into Crazytalk. It's then just a matter of adding some positioning points and your greyhound will be fully animated and ready for the audio track and effects to be added.
Take a look at the video below which gives a perfect example of how dogs can talk in Crazytalk.