What to do about my horse?

Ok i deleted my last question because some people seem to be a bit snobby when it comes to horses. My question is how should i get my horse who i believe is injured to come to me. He loves to play at pasture and has come to me countless time with sore muscles and i have respectfully groomed him, hosed him off , and let him graze in fresh grass. and do simple ground work, he isnt very respectful but i have been eagerly working on it and i have seen good improvement. He is always uncontrollable when i come home from a trip. So i came home yesturday from a week away. for the first time since i bought him i spent two unsuccessful hours in the pasture trying to catch him. i approached slowly but then he would bolt when i got close. I played with the other horses trying to make him jelous which used to always work and he ignored it. When i left his hind legs were sore and a women who had her horse for over ten years told me that his hind legs werent going all the way forward. She told me not to panic and to call the vet if it was still there when i came back. I asked her if she could keep an eye on him while i was gone and she did. Yes when i come back from a trip i usually lunge for about ten minutes and he will get a bit sweaty but it takes a lot more then that to tire my horse out. If its cool out i take him for a ride after that not working him much if he isnt up to it. (but he is always overly eager to run) I have been working with him and i left for a week to make mends with family. He is now in his own little pen and i plan on calling out the vet today. But i need to catch my horse for the vet to see him so can someone kindly please tell me something that might help. Ive tried treats and apples. Anything else you may recomend?