I would combine positive reinforcement with the collar if you do use it. We havent used our collar in forever and lost it, just found it again, but i taught him a game called "look at that" starting inside with a toy or piece of paper, pull it from behimd your back and when they look at it and then back at you you click and treat or praise. The key is looking back at you. Then add the words. Then move to distractions, you can use it for them reacting to dogs, the chickens, etc. I was planning to use it from really far away where he can see them and slowly, very slowly, move closer and did try it twice. But then recently he magically started being fine with them. They don't free range but he'll flop next to the pen or somewhere further away where he can see them and us. He ztill had his moments where he does a half jump to the pen or slams his paws down and he likes to circle the pen sniffing and any time they freak he gets very excited. Sometimes he lays down and fixates on them. But we are working on it. I have been using hot dog or something delicious when he listens and a firm NO or a yuck on his leash and chocke collar when he makes a move towards them. Or a simple gentle reminder of "be nice". I would not listen to Ceasar. And if you use the collar, like was mentioned be careful using it. Though I would try the above first, you may not even need the collar. For some dogs verbal correction or a leash pull, even with no choker is enough. I would start on a leash. And another thing is licking her lips isn't necessarily that she thinks they're food, its a stress behavior. Of course not every dog that does it is stressed but they could scare or overwhelm her or often dogs will use it to,calm them down if they get over excited. Maybe she is trying really really hard not to,eat them lol i think macho can learn too. Just be gentle yet firm and patient, it won't happen overnight. And you can even get the collar and train in conjunction with the positive reinforcement. But like Ralphie said they are expensive so i wouldnt necessarily rush to buy one.