I know that racing dogs in Arizona are very prone to a Valley Fever tickbourne disease.
Yes... dogs are susceptible too.
But no, it's not spread by ticks. It's inhaled.
http://www.vfce.arizona.edu/Content/Documents/Valley%20Fever%20in%20Dogs%20for%20PDF.pdf
I got it when I moved to AZ - knocked me out for a month or two...