To turn out - I would say around 10/12 - with acp it is a bit of trial and error tho as to how they respond to them.
Would be hesitant to ride on them - but to take the edge off - 4/5.
To ride - friend's horse was still wild after 14 (15.3 TB) but have known others quiet after 4 or 5, really depends on the horse
To turn out - easier to get the vet to IV sedate and then leave horse in the field to come round
As RobinHood says, depends on the horse. I have known a 16.3hh WB type who was still pratting about on 9 ACP and fell over with 10, which wasn't overly useful as he was supposed to be hunting!
I'd give a few and see how the horse looks, or ask the vet who has presumably been treating the horse as they might have an idea of how they think horse will react?
I'd use Sedalin instead - ask your vet to send some. I don't really rate ACP, you seem to need absolutely loads. I used to use 12 tablets to clip my old horse and he was never dead to the world, just took the edge off. I've known people hunt on 4 or 5.
I give my 16hh WBxTB filly x6 in her breakfast when she's in for the day. That dose definitely takes the edge off her and she dozes for most of the day. By the time she perks up from the a.m. dose, the other horses are back in for the night and she's happy without sedation.
I think you could safely administer x10 ACP tablets to your chap in one dose, initially. My filly is only 2, very fine and light of bone, so I'd assume your substantial WB chap is probably a couple hundred Kg's heavier than mine. I'd try x10 initially, see how that affects him and adjust the dose if necessary.
Remember, ACP/Sedalin works most effectively when a horse is relaxed so the same dose given on different days may show different levels of effectiveness depending on what's going on around the horse at the time of, and shortly after, the ACP is given.
Not sure I'd want to ride whilst using ACP, but certainly not without carefully observing a horse's reaction to ACP over a considerable period of time to guage the correct dose.
It's good for relaxing a stabled horse though... And definitely cheaper than Sedalin.
This may be too late... but my horse is same size and breed as yours and I used to give her 6-8 for the farrier and it took the edge off... most I have given is 10 and she was too worked up for it to do much, that was with injections which she hates.
Mines a similar type although honestly mines more fat than beefy, ha ha. Been on box rest for 5-6 weeks, Currently giving 5 just so i can groom and handle without loosing a limb. If i have to trot up or put on the lunge at least 15 is needed and even then is still pratting about. I dont think i'd be alive without ACP at the mo, so depending on the temprement of the animal in question I'd always go for an extra couple to be on the safe side, especially if you think either you or the horse may get injured.
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