I'm trying to establish care with someone who can take care of our dog with diabetes. I know that you can mark yourself as having experience with injected medication but you can't filter by that as someone looking for care.
No, you can't. You would have to read through the profiles. Another option is to call Rover Customer Support at [Edit: Rover’s contact options have changed. Visit the Rover Help Center at https://support.rover.com/ to find the phone number, help articles, or chat with the team] because they do have that ability.
Please convey to them that customers need better search capabilities than the minimal ones provided. Rover has been in business a long time and hasn't bothered to improve the site. They need to hear from customers because they don't listen to their sitters.