Recommendations on a good supplement that contains both?

I do Renew Gold and Forco on some of mine.  They look and feel great.  

UKELE " GUT" has them both. Just double checked and its in bold print on the label. LOL It comes in powder or pellet. I have used the pellets in the past with great success. 

Platinum has a nice one. 

I feed Grand Meadows Grand Premium Plus and it has a pro and prebiotic amongst an array of other wonderful things.

I use Forco, you really need to read up on it, its got some really good info about it.

I used Forco in the past and wasn't that impressed with it.

We put a proprietary Prebiotic in Renew Gold. We do not add a daily probiotic because it is not necessary in a recommended Renew Gold diet. Where a probiotic is useful is after surgury, high stress from sickness, a heavy antibiotic use, or with a ration that includes a high amount of grain based feed. All of these situations are very hard on the existing microbial population in the hind gut. Our theory is not to keep adding benificial bacteria every day, but rather to quit killing the naturally occuring bacteria that are present in the hind gut. A prebiotic, on the other hand, enhances the environment for the naturally occuring beneficial bacteria to maintain a proper healthy population, and can provide a benefit from a daily inclusion. 

Thanks for the info Win! I was only looking to add it because in my research I read somewhere that adding both can be beneficial to an ulcer prone horse. I am feeding a forage based diet with minimal grain. I don't even think my barrel horse gets more than a pound (I have to find my scale and weigh it) of pellets. She also gets  alfalfa pellets, grass hay 24/7 and then alfalfa cubes.

Fastrack Equine Microbial has both pre & pro-biotics in it.  That's what I've used for many years.

There is a place for a probiotic in the diet of a horse whos digestive system is not fully functional. My preference, and I am sure your preference also would be to reach that fully functional state and eliminate the base cause of the disfunction. In your case being ulcer prone. The diet you are feeding should have very little chance of creating a diet caused ulcer. That said, there are other reasons that a horse gets ulcers. My use of probiotics is typically in cases where I can't talk owners out of feeding grain. In that case, both pre and probiotics, and additional Omega 3 can put a bandaid on the problem, but not eliminate it. One pound per day such as you feed should be handled easily by most horses. It woudl still be better to eliminate it that if you can. 

Stride Animal Health ADR

https://strideanimalhealth.com/adr-powder/

I feed Triple Crown Complete which has Pre and Pro biotics in it.  

I was contemplating switching my guy to this, since it's now available in my area. Is it a sweet feed type consistency or pellet?

Triple Crown Complete. 

Thank you!

Mine doesn't have that much oats in it.  Its a lot of beet pulp.  Read up on their website.  Lots of information.