Hi @AmyS,
On behalf of the forum team, a warm welcome to the TrustedHousesitter’s community. I have seen some posts similar to yours that have a “menagerie,” I do not have any experience with horses or caring for them. However, I know there are many in our community that do and I hope they will chime in with their thoughts on your concerns. There’s actually one sit going on right now that has been sharing their experiences with the horses they are caring for on the TrustedHousesitters Instagram stories. I would also think during the interviewing process it would be fairly simple to discern who really has horse experience and who doesn’t with a few questions 
but maybe that tells you more about how little I know about horses.
If you do decide to become a member of THS, as you cannot share a link to your listing in this post, do share a link to your listing on your forum profile for a bit of extra exposure. But the main website is where ALL our members will see your opportunity and be able to apply and message with you.
If at any time you need any help don’t hesitate to reach out to our community here which is full of helpful members who have been through the process themselves and will happily give advice and guidance. And don’t forget our membership support team are always on hand to give assistance.
All the very best,
Kelly & the Forum Team