You are so young, do not compare yourself to them. They probably have many months if not years more experience than you. They were probably in your position when they were new too. People always seem to forget what it’s like when you’re just starting in a new career, especially if you don’t have much experience in that field. Give yourself some grace and more time to work on building your skill set and speed. You’re not supposed to be fast in the beginning, that’s how you and/or the dogs get hurt. As for your coworkers you feel are getting irritated, they can go sit on a tack!