For long hauls DO NOT wrap their legs, it conducts heat under the legs and can cause problems if they were to come undone. I would handle him with a stud chain when he first comes off the trailer. He is going to think he's going to the track to race. He will be pumped and there will be adrenaline, without the chain he may pull you around like a rag doll. For the first week I kept my ottb with a stud chain because if he had a moment he could have easily pulled me behind him like a flag.
I'd also look into supplementing him for magnesium and treating for ulcers. 90% of racehorses have ulcers. I would consider treating him for ulcers as well as look into a purina product called outlast which helps regulate the pH of the horses stomach which can help with preventing ulcers and help horses with ulcers. It did wonders on my ottb. I also use a product called supersport from purina which is also phenomenal once you bring him into work. It's an amino acid supplement, it will not make him hot or tense but it helps with muscle recovery and muscular development. https://www.purinamills.com/horse-feed/campaign/outlast https://www.purinamills.com/horse-fe...cid-supplement https://shop.performanceequinenutrit...store-p45.aspx
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When I brought my ottb home, I immediately treated him for ulcers. He had pretty obvious symptoms. He just looked uncomfortable in his body, not finishing his food, touchy around his belly, would nip at everyone but me, etc. He made me super nervous the first few days because he wasn't pooping or eating a whole lot. I put him on magnesium because it helps with muscle tension and he had pretty tight muscles all over his body and was just so up. I think it's made a big difference, my wb mare has to be on magnesium or she doesn't move quite sound. Then putting him into work, I supplemented him with supersport to help aid in muscle recovery and development. It makes a BIG difference. Super effective. The outlast helped him be even more comfortable in his body. I saw a difference within a day, finishing his hay, wasnt touchy around his stomach, etc. It's an excellent product.
ACE. I gave 2ccs of ace intramuscular to my ottb the first two days, then 1.5, 1, 0.5 etc and weaned him down over the course of a week. I used it before turnout and let it sit in his system for 30min to be on the safe side because they DO NOT know what to do with freedom and WILL go and go and go, stress themselves out and it's just less productive imo. It's better to start out with them being a little snockered going into turnout, so they learn not to have a stress or panic reaction to turnout. It can be pretty overwhelming for them, especially depending on how hot his temperament is and how long he was on the track. My guy is fairly hot. He has a good brain but he is hot.
I'd monitor him while he's in turnout (not glare at him but just see how he is, if he just looks stressed, upset and running I'd bring him in) and don't leave him out for an excessive amount of time to start or they get stressed out and upset because they're not used to turnout. Gradually increase time. I'd also start in a smaller space before moving him to a big field. Small paddock before big field because the big field can be overwhelming. I'd keep him isolated for at least the first few days-week. Not totally isolated, so he can see them but not in the herd.