Recently (as in yesterday) I adopted an older paint gelding. The previous owners needed to rehome him due to one of their other geldings bullying him. He is 24ish years old according to the previous owner and not in the best of shape. He is 15-15.1 (sticked him yesterday) and weighs 750-800 lbs. Looks to me that he could stand to gain another 100lbs at least.
The trouble is he has foundered in the past (10 or more years ago) so I am not totally sure how to go about putting more weight on him safely as I have zero experience with previously foundered horses. Right now he is in my roundpen which is dry with very little grass, (and what is there is very short and dry) mostly bare ground. I have been giving him free choice hay (takes him all day to eat 4 flakes and then another 2 at night) and he gets a 3QT scoop of Sentinel Senior Formula Sentinel™ — Senior Formula morning and night. At his former home he got the 3QT scoop Sentinel morning and night and 2 flakes of grass hay morning and night and was in a dry paddock all day with several other horses that bullied him. He is also now on a hoof supplement that was recomended by my feed store owner that I forget the name of as well as MSM.
I would like to keep him on the Sentinel as he eats it well and it seems to be a quality feed for senior horses but would like to add something to change it up as well as bulk him up. What can I give him and what ammount that is not too rich for his digestive system? Or maybe just up the Sentinel? Im having the vet out in about a week and will ask (the earliest she can come) but was just interested in hearing a variety of opinions on what I can do for him and others experience with elderly/foundered horses. I also have the chance to buy oats in bulk for my other horses, could this work for him? I also always have a high quality 12% sweet feed and 12% pellets on hand as well.
Also as far as his feet go they look pretty good, they were kept up at his previous owners and were trimmed the day before he came to me. Luckily I have a great Natural Trimmer who comes and does my horses and he has experience with foundered horses. He is coming out next Sunday to trim my horses and I will have him take a look at this new guy and get his opinion.
So nutrition and feed gurus, what can I do for my new guy?