Hi Courtney!
You can definitely use those reviews - after all, they're reviewing your skills as a pet sitter which would be great for your business and for future customers to see. However, you cannot edit them in any ways. They must stay in their original format but you could use ellipses to highlight the most important part of the review that you'd like to display.
For example -
This may be the full review I received:
"Lindsey was great. She sent pictures and gave me updates on my boxer was doing. Was also accommodating with the dropoff and pickup times, let me drop her off at 6am to catch a flight and was very flexible when my flight was delayed. We would definitely recommend Lindsey and I'll be using her again."
But if I don't want to display the entire text, I could say -
"Lindsey was great. She sent pictures and gave me updates on my boxer was doing...let me drop her off at 6am to catch a flight and was very flexible ...We would definitely recommend Lindsey and I'll be using her again."
You can paraphrase the review so your most positive and important qualities are highlighted. Hope this helps!