He had bad tooth and tmj
I presume his teeth got addressed? How about his 'TMJ'? How did you fix that - chiropractic vet, or...?
2x's a day he gets:
1lb beet pellets soaked
2lb alfalfa timothy pellets soaked
1 cube of purina hydration hay soaked
plus his regular 3lb of safechoice grain
Never heard of the 'hydration hay', had to look it up. Appears it's just an alfalfa/grass mix that's compressed, so requires 'watering' to be edible?? If so, I wonder what your reason for feeding this and the alfalfa/timothy pellets, which are essentially the same(??).
Cons of those things... hay/processed feed loses nutrients compared to fresh feed, so an appropriate 'ration balancer' or other nutritional supp would likely be a good move. *Worth looking into carefully tho, because all 'ration balancers' are definitely not equal & giving supps willy nilly is often wasteful & sometimes even harmful, if they're getting 'too much of a good thing' for eg. Also alfalfa is generally high in protein, phosphorus, potassium and calcium, so that needs to be considered. Maybe too high protein, etc for some horses. Alfalfa is also high energy, can be too high for some horses - 'easy keepers' or not in hard work for eg.
Beet pulp cons... It's actually higher energy than alfalfa(similar to oats), so as above, a 'con' for an easy keeper. If it's molassesed, can be high sugar. It's very high in calcium, low in phosphorus & magnesium. It's quite high in potassium, especially problematic for HYPP horses.
Safe choice cons... No fixed ingredients & main ingreds are 'byproducts'. It's usually got corn in it. It's relatively high NSC(sugars) so not generally a 'safe choice' for horses with metabolic issues/risk of laminitis. High energy. High fat - not generally great for horses not in very hard work, better to gain 'condition' from structural carbs than from fat.
Feeding twice daily, rather than free choice forage, could mean the horse is left hungry for extended periods, if he eats his meals quickly. Feeding 'rich', grainy meals only twice daily can also be problematic. Esp with high NSC/grainy feeds, little & often is best.
I ask because he's been really grouchy, and at times exhibiting stud like behaviors. I am going to have a vet out to start the process of checking things over on him
What's the 'studlike behaviour'? Great you're getting a vet, but a bodyworker, such as a chiropractic vet might be more appropriate, if he's got a body/pain issue. Chiros will also be able to diagnose stuff like ulcers, a common cause of pain/grumpiness. But as he's on a high energy, high potassium, high calcium diet, these are 3 nutritional causes for 'bad behaviour', so very possible diet/nutritional balance could be the issue.