Almost everything, sadly. The dogs are all crammed into two tiny rooms. Too many dogs per handler, you end up extremely exhausted by the end of the day. You have to keep the place clean while picking up after 21-40 dogs per room and you're the only handler per room. That means, you're in charge of picking up and mopping up all their poop while keeping them from attacking/humping each other (because none of the dogs seem to be psychologically evaluated in group settings and are just a mish-mash of personality types that always manage to spur conflicts). They don't have relief walks for the dogs, so prepared to be afraid to touch anything (even the dogs) in the room. Also, be prepared to never want to touch your face again. The dogs poop everywhere, there's no astroturf. And, it's the poop, (watery, diarrhea, hard, smelly or smushy poop) of 21-40 dogs! You clean it up by picking it up then mopping the area, which, in my opinion, is gross. Their relief walks are *so* short, I think we have enough time to afford to do them for all the dogs.
Speaking of which, the work place atmosphere is ABYSMAL. Every day in those cramped, dirty rooms where they try to cram in as many dogs as possible... You can tell the dogs hate it: they're all very stressed and are either pacing, curled up in a corner or crying/barking at the door, waiting for their opportunity to jump/run out of the rooms. (Some of the smarter ones immediately learn how to open the doors and attempt to run out themselves....). There are no toys and no walks, so nothing to facilitate calm, work-out intensive play or stimulation, especially for the dogs that don't necessarily enjoy the company of other dogs. All of that rubs off on you. You'll likely hate it. Lord knows I do. I just want to go home at the end of the day. You get so tired breaking up fights and cleaning up poop (and fighting off poop eaters) that you don't even get time to hang out with the nice, well socialized or loner dogs that seem like they obviously need attention. Just sad. The dogs are not dogs to them, they are $$$dollar signs$$$, you will learn/see this immediately; I'm only sad the customers don't.
Also, coworkers suck. They are very a/ntisocial for dog lovers, almost all of them seem there just to get in and get out, some know absolutely nothing about dogs. (Sad...).