Talk to people in your vet's office. Ask them for recommendation
s for a place that is clean, has high health standards for all the other dogs who are boarding and then ask for people who have boarded there. Get recommendation
s from them.
Really, I would prefer your friend who you know and just leave her explicit feeding instructions. It's so easy for them to pick up various diseases from boarding facilities and if your friend's dogs are healthy I think it's safer. I know a number of people whose dogs have come home with kennel cough, or icky eyes or injuries.
Because Cowboy has medical issues, he costs us a fortune to board because most places want nothing to do with an epileptic dog who requires rectal valium
! He and Chester usually stay with a friend who has 7 Newfies!