Greetings Alicia!
Walt Disney World Resort values Guests with disabilities and does a great job accommodating their service animals. I think Pluto would definitely approve and I hope you do too on your upcoming visit.
Not only can you find Service Animal Relief areas throughout the park, as well as shady spots for them to rest awhile,
service animals are welcome on many of the attractions. There are however, a select few that would not be safe for them due to the nature of the attraction. It is at these attractions where you will find the ability to use
Rider Switch with another member of your party or the service animal portable kennels. You'll find a list of restricted attractions and cautioned attractions on the above "service animals" link. It is always best to speak to the Cast Member at these attractions about your concerns and what is available at the moment.
Please let us know if there is anything else we are able to assist you with, Alicia! I hope you and your four-legged service companion have a magical vacation.
Pixie Dust,
Lauren