Pros
The product truly does benefit the dogs. You are doing genuinely good work if you know your stuff. Get to hang with dogs too.
Cons
Mass corporatization made the job much more stressful than it was previously. They stopped supporting the employees in stores financially, professionally, and strategically, and created a number of processes that got in the way of work rather than help achieve success. Lack of institutional memory was something I would constantly have to cover for in educating people above me. Newbies no longer get sufficient training to the point where I as a customer wouldn't trust anyone in my position anymore. Communications systems currently in place are structured to breed contempt and sabotage among employees. They make you re-interview for minimal raises/promotions. HR actively creates problems rather than solving them, and an HR rep even made personal attacks towards me to which I never got an apology. The company mission statement was changed to no longer put the dogs first. The company comes first. They are not subtle about this change.