I worked in a dog day care for a year, and I really enjoyed it. Granted, plenty of times during work I just wanted to go the heck home, but I didn't get sick of dogs...I still chose to foster and enjoyed coming home and spending time with my fosters, although sometimes felt like "ugh, I have to walk you? My feet hurt" lol. But enjoyed training them, etc. I also worked in grooming, long (13 hr days 4 days a week and a half day one day) and I loved it. Granted I loved my boss and clients, which helped a lot..but I never got sick of being around dogs. I think working with them actually made me more interested in volunteering with them when I could, going to more shows, puppy fever, etc.