I tried "charging up" the word come kind of like you charge up a clicker before you actually use it. So I was sitting on the couch with Teddy sitting next to me and I would say "come" and then give him a treat right away. It seemed to help him make an association between the word and the treat, which has helped tremendously outside where there are plenty of distractions. Sometimes he gets fixated on a bird or something and I have to pull so hard to reel him in that I feel like I'm abusing him. It's frustrating, but we're working on it and I'm seeing progress little by little. With no distractions, his recall is great.