Not sure how many other posts you all have read about GI stasis and I hate to bore you with repeating myself again and again... and just to remind you all, I am NOT a rabbit expert... just one who has been treating rabbits for many years and have been learning from the veterinary rabbit experts out there. My opinions are basically theirs, but many of their 'opinions' are based on many years of experience and factual data resulting from research they have done at the univeristies they work in, or through private funding. And my ideas about how to treat rabbits are always changing based on 1) how my rabbit patients respond to my and other's treatments and 2) the latest trends and ideas the experts write about on treating rabbit diseases.
1. at this time there seems to be no data showing that there is any benefit whatsoever of giving rabbits pineapple or papaya juice or tablets, other than helping to maintain a certain acidity to the stomachs of rabbits that have lost their acidity for some reason or other (not a very common situation actually). Pineapple and papaya enzymes, though fairly potent, are worthless in 'digesting' or disolving hair- even products like Draino struggle with breaking down the proteins in hair and these products would NOT be good for rabbit stomachs. Many experiments, from simply putting rabbit hair in a bowl of pineapple or papaya juice for prolonged periods of time, to more sophisticated studies have pretty conclusively shown these products ineffectiveness at doing anything in terms of breaking down hair or 'hairballs'. Anyway, the presence of hair or 'hairballs' in the gi tract of a rabbit does not seem to have much, if anything, to do with GI stasis anyway. Only rarely is hair actually involved in a true blockage, and the current feeling is that these blockages with hair are only secondary problems complicating an already abnormal gastrointestinal motility resulting from improper dietary fiber intake.
Pineapple juice is a source of water, though water itself would be preferrable. However, it is not easy sometimes to make a rabbit drink water, particularly when their guts are uncomfortable, and it is often easier to get them to drink something sweet, such as pineapple juice, instead. The benefit of the water they ingest versus the down side of all the sugar they intake doing this is a bit unclear, and I am not sure how bad just several doses of sugary fluid is for rabbits. I will just say water is always preferable over pineapple juice, IF a rabbit will drink it.
2. As for the down side to giving rabbits pineapple juice or tablets, that is a bit more controversial. Sugar is not something a rabbit needs in their GI tract, particularly when it is not working properly, but it is not clear that it is always harmful, particurlarly in small amounts. Sugars, like those found in these fruits, are not ideal for the rabbit liver, either. Probably very small amounts of sugary treats are not that harmful but still not recommended.
3. Though I have said this several times, pellets are NOT considered necessary for rabbits. And a rabbit suffering from some gastrointestinal malady, such as ileus/gut stasis should probably not be getting ANY pellets at all. A gut that is slow or 'stopped' benefits from the presence of long fibers and moisture, neither found in pellets. If you insist in feeding your rabbits pellets, at least stop when/if they are showing any signs of stasis such as decreased appetite, small or scant stools, bloating, abdominal pain, decreased water consumption etc. Most of the veterinary rabbit specialists are in the 'no pellet' boat right now, though it took them some time to get there. But I don't know if they are all militantly NO PELLETs yet. Some are, but most are a bit less adamant about this part of a rabbit's diet. So if I see a client's rabbit that has no digestive issues whatsoever, and they are feeding their rabbit a small amount of pellets regularly, I try not to argue with them. But if their rabbit had a history of gut stasis, even once, I would urge them to adopt a pellet-free diet from that point on. Better to avoid gut stasis altogether than have to treat it over and over again. I have very few rabbit patients that suffer from gut stasis that eat only hay and greens and get plenty of exercise. I do sometimes see rabbits a bit on the thin side on these diets and sometimes I see some weight gain with a few added pellets a day. Those are the exceptions rather than the rule, though.
4. Speaking of exercise, I think it is one of the more overlooked part of a rabbits care. Rabbits that move around a lot and keep 'fit' tend to have less abnormal gastrointestinal episodes. Whether this is just my feeling about this, or actual fact, I cannot say.. yet. but I think we need to try harder sometimes to get rabbits to be more active (without stressing them out of course).
5. the use of Metoclopramide (Metamide) or Reglan is also controversial now (something I didn't think a few years ago). I had always assumed all those rabbits I treated with this motility modifier that got better from my treatment, were benefitting from the use of this drug. Until I read that a lot of the experts now felt this product did nothing useful for rabbits at all. So I reluctantly stopped using it and noticed my patients were improving despite my not using it... which means all the other patients in the past were getting better despite my using it. In other words, I don't think I did much, if any harm, using it, but nor do I believe anymore that it was really helping, either. If your veterinarian wants to treat your rabbits' GI problems with metoclopromide, I don't really see how it is harmful (unless, under those few circumstances when there is a physical blockage or true bloat... then it might be a problem)... but it's use is coming under question nowadays.
Anyway, those are my random comments about rabbit GI stasis today. I am glad your rabbit is better and I sure hope it stays that way.