neutrena xtn vs safe choice, need more bulk.

Anybody use Nuetrena xtn? I have a ottb, 7 year, moderate exercise shows 2'3. Needs to bulk up more. Right now mixing 1/2 safe choice and xtn. Thinking of switching all to xtn. Have tried wheat germ oil, weight builder, beet pulp, a daily dewormer, nothing wants to bulk him up, he gets plenty of hay daily.
Any comments or reviews???? Thanks

Have you tried SmartGain by SmartPak? I tried EVERYTHING and it's the only thing I've seen a noticeable difference with.

No, I havent I will check into that! Thanks

Ive been told purina ultium is good for gaining weight
And, I wouldnt recommend a daily feed threw dewormer, my BO swears it doesnt do anything, and I've met several horses (including mine) who were on the daily dewormer, and then had a fecal test, and were actually full of worms. The daily dewormer didnt do anything. I no longer feed it. I would recommend every 60 days a rotational deworming schedule

I'd try some alfalfa pellets and flax. Or look in to calf manna.

Rice Bran is what is being used on an underweight Appendix here in my barn, and it seems to be working well. I use Safe Choice on my horse, but that is more for maintaining weight than gaining.

The daily dewormer is not doing anyhing, his fecal is negative so I will fiish up the bucket and then im done with it:) I don't like to use any alfalfa, for him it might cause kidney probloms so I don't think its worth the risk. It can cause calcium build up, and alittle to Hot. I only use timothy hay. I think im going to go back to beet pulp. I am going to try the pellets. I mean heis def more thicker than 80% of his ottb counterparts. I would just like his top line thicker. I may never get it, its just a thouroghbred for you!

Beet pulp, and Weight Builder powder on top his grain will help.