Ok, from the point of view of a kennel owner I will say...it is normal for many people to not want to leave their dogs. It is normal for folks to leave them with no problems. Every person and dog is different. Some pack more for their dogs than I send with my kid to camp, with bagged by the day of the week food and treats and toys and some don't even bring a leash.
As was noted by one person...some places may not match what your dog wants. Some places will not match what you want. These two things are not necessarily the same.
Honestly I tend the dogs with healthy indifference. No dog wants a stranger in a strange place to hug, cuddle or play with them. That takes trust and time. Dogs that don't want to eat generally get sick if you make them eat ....especially with bribing with canned or some other nummys. If your dog comes home lighter I would ask how they ate. Some dogs sulk and don't eat as much as at home. Some dogs just don't eat much...especially without mommy and daddy shoving human food into it and making it all wonderful so that their 40# beagle will eat his dinner. Happily it is a rarity for me.
I let the dogs come to me by sitting off to the side while they are out in the yard. Or, if they are overwhelmed...in their run. Most dogs settle down for me with my just being around them a day. I also verbally praise everything they do that can possibly be called right. Non cooperation is ignored and bribery is used to get the dog to do what I need. ie going in and out of their run. Barking, growling or any show of aggression is likewise ignored.
All that said. MANY people, working in a kennel or not, try to force themselves on dogs or tell them what to do. This generally rubs the dogs the wrong way and stresses them.
Dogs that have been to my kennel more than twice usually come in the door pulling their owners and looking for a run. There will always be dogs that don't do well boarding and don't adjust...so every minute of being away from home is horrid. You can't make everyone happy.
I will also say I have had several people who board now because getting the neighbor or a petsitter to watch the dog or cat didn't work out....cat's ran off, dog wrecked the house, they overfed, underfed or didn't vet a sick dog etc.
I have had people show up unannounced and I have been nice even when I am in the middle of something...I know they are trying to 'catch' the place filthy or chaotic or with me pulling toenails out of kittens in the back room. Personally I think it is rude but I understand and I am honest with them. You may walk in on a stinking nasty smell because ONE of the 25 dogs was stressed and ill during the night. You may come into a near empty kennel that is cleaner than my kitchen.
I will tell you a couple easy ways to find out if a place is good. ASK the local vets, ASK your neighbors, ASK for recommendations from pet stores. And if you call around at the last second on a busy holiday weekend and they have a vacancy....run. Unless they had a last minute cancelation and by some freak didn't have a waiting list of long time customers it is because they SUCK at what they do and you shouldn't trust them with your dog. YES, ask for a tour. I invite people that want to see the place at it's worse to come at 7:30 am on a Saturday. No time is busier and the animals have had all night to make it horrid. Funny, but I have not ever had someone show up then.
Also, all our local vets that board charge nearly or more than double what I charge...and I don't have sick animals housed in the same building. Not knocking vets but the only upside is if you have an already ill animal or one that loves it there. My vet even says....you get the same or better care elsewhere. I am in the country and the dogs have in/out runs all day long and access to a playyard. In town / city kennels have specific run times due to ordinances or too much noise and neighboring homes complaining.
ASK to see the runs, the yard, and ask for a typical day schedule. You might actually find someplace you like.