Hi- Welcome to the forum! I've learned so much here and the peole are great. I'm not as knowledgable as many members here, but my bunny, BunBun (3 yr old dwarf something or other) has poop problems too. He will do fine for a while, then suddenly he will smell awful and here we go again. It doesn't seemto bother him much- his appetite is always fine and he acts normal. But I think he might pull at his fur to get the poop off and irritate himself, which can't be fun.
So Rowan doesn't get any veggies, right? If he gets any fruit or treats, I would try cutting those first, but since he has this problem, you might have stopped that stuff already. Some bunnies with chronic stomache issues need to be put on a pellet free diet. My bunBun doesn't get any pellets, due to his tummy and bladder sludge. It did seem to help somewhat, but he's been having problems again this past week. So you might want to try stopping pellets- but since Rowan doesn't get any greens, he may need some supplements so he gets all his nutrients. Be sure to ask your vet about this.
Another thing I have tried with Bun is giving him Benebac. It's a probiotic sold in pet stores and it comes in tubes of gel or powder form. I use the gel tubes- it's banana flavored and Bun loves it- licks it right off a spoon! He's very picky so that was a syrprise. Now this isn't a sure thing- sme people think it doesn't help, while others find that it does. But I don't think it can hurt. I noticed a real improvement, but now I've given it to Bun twice this week and still he has soft poop. It really is frustrating ho things seem to work, then stop after a little while. Have you brought a sample of Rowans's stool to be tested at the vet? I think I'm gonna do that with BunBun. They can have parasites that give them stomach problems. I don't know if Rowan has ever been outdoors, but Bunbun has before we found him. That increases chances of parasites, obviously.
The weird thing is that when BunBun had bladder sludge and needed to be on antibiotics and Metacam for about 3 weeks, he had no poopy butt the whole time. I though that he was somehow "cured" either from the antibiotics or the Benbac, but then it came back later on
. Maybe there is something that can be helped with antibiotics... but any meds, especially antibiotics, can be hard on a rabbit's digestive system.
I never heard that Metacam helps poop problems, but if both vets told you to use it there must be some benefit. I thought it was for pain and inflammation though, and can actually cause stomach upset. I would get a second opinion on giving Rowan Metacam- if he's not in pain it may not be needed and could actually be doing more harm than good.
If Rowans's weight is normal and he acts fine, he is probably just a rabbit with a sensitive tummy. Of course you should keep trying to find a solution, but it seems to be a pretty common problem, so I wouldn't worry too much. I'm in the same situation, so I will let you know if I get any info on it or find something that works, and you can do the same.