Sorry to hear Obi is still having hairball problems, but I am happy the vet does not think it's lymphoma or IBD.
From reading your posts over the past couple of months, it seems that Obi vomits whenever you increase his dose of the Vet's Best. Maybe there is an ingredient that does not agree with him. This is why I am using the active ingredients on their own and not purchasing the product itself- because I have concern over how Tim would react to some of the ingredients. Tim is one who used to hack up hairballs very frequently and we've not seen one from him since early May. But I am seeing a lot of hair pass in his stools. My girl Abby never had hairballs but has hacked up a few this spring. I tried the hairball blend on her, but she threw up each time. I've since discovered that she does not tolerate slippery elm, so she gets just psyllium and marshmallow root and that is working for her, as I am seeing hair in her stools.
So you might want to try just the active ingredients - pysllium, slippery elm bark, and marshmallow root. The amount in a single tablet is 50mg psyllium and 25mg each slippery elm and marshmallow root.* That's what I give Tim once per day and it seems to be working. I give Abby equal amounts of psyllium and marshmallow root a few times a week and I've not seen anything from her in almost three weeks. I have been using just the dry powders, then mixing with a lot of water when I serve. With Tim, however, I may experiment with slippery elm syrup along with the other two powders, as we are adjusting to life without cisapride.
One other thing that seems to have made a huge difference with Tim is the addition of probiotics. His hairball frequency really dropped after we started them in March, though it never went away. It was when we started including psyllium that I noticed the extreme reduction in hairballs.
*I had been making the equivalent of 20 doses at once using: 2 500mg capsules of psyllium, 1 455mg capsule of marshmallow root powder (plus extra by weight to get to 500mg), and 500mg by weight of slippery elm powder. I eyeball doses, keeping track of what I've used so I know how to divide the remaining.
From reading your posts over the past couple of months, it seems that Obi vomits whenever you increase his dose of the Vet's Best. Maybe there is an ingredient that does not agree with him. This is why I am using the active ingredients on their own and not purchasing the product itself- because I have concern over how Tim would react to some of the ingredients. Tim is one who used to hack up hairballs very frequently and we've not seen one from him since early May. But I am seeing a lot of hair pass in his stools. My girl Abby never had hairballs but has hacked up a few this spring. I tried the hairball blend on her, but she threw up each time. I've since discovered that she does not tolerate slippery elm, so she gets just psyllium and marshmallow root and that is working for her, as I am seeing hair in her stools.
So you might want to try just the active ingredients - pysllium, slippery elm bark, and marshmallow root. The amount in a single tablet is 50mg psyllium and 25mg each slippery elm and marshmallow root.* That's what I give Tim once per day and it seems to be working. I give Abby equal amounts of psyllium and marshmallow root a few times a week and I've not seen anything from her in almost three weeks. I have been using just the dry powders, then mixing with a lot of water when I serve. With Tim, however, I may experiment with slippery elm syrup along with the other two powders, as we are adjusting to life without cisapride.
One other thing that seems to have made a huge difference with Tim is the addition of probiotics. His hairball frequency really dropped after we started them in March, though it never went away. It was when we started including psyllium that I noticed the extreme reduction in hairballs.
*I had been making the equivalent of 20 doses at once using: 2 500mg capsules of psyllium, 1 455mg capsule of marshmallow root powder (plus extra by weight to get to 500mg), and 500mg by weight of slippery elm powder. I eyeball doses, keeping track of what I've used so I know how to divide the remaining.