What were the old pellets you were feeding and what pellets are you transitioning too?

If diarrhea is still occurring a few days into the new pellets, yes, I would stop giving them. Please note that true diarrhea in rabbits is considered a medical emergency: https://wabbitwiki.com/wiki/Rabbit_poop#Diarrhea … Can you get a hold of some of the old pellets to aid in transitioning more smoothly?

I agree it would be good to clarify if he’s having some soft poops, or true liquid diarrhea (which is an emergency).

If he’s eating hay OK, I would give no pellets at all for a bit until his tummy gets back on track. What amount of pellets are you feeding? “1 part” may still have been too much for transitioning if he’s getting a larger portion of pellets.

You could start with like a 1/4 or 1/2 teaspoon of the new pellet and feed that for several days to a week, until you are sure they aren’t upsetting his system. Then slowly increase it to 1 teaspoon, then 2, etc.  over the course of a couple more weeks. I only give my adult rabbits about 1 tablespoon of pellets per day total.

If even the tiny amount upsets his system, there could be an ingredient in the pellet brand that disagrees with him, so you could compare it to the old brand and see if there are any new ingredients that could be the culprit.

Yes, I think going to a straight 1/4 cup of the new pellets was too much all at once. But it’s good that his poops are improving. At this point, I probably wouldn’t bother reintroducing the old pellets. At 7 months he is also almost done growing, so you can start feeding him a more adult diet with fewer pellets.

If he’s eating plenty of hay, I would opt to just stop the pellets and then very slowly reintroduce them.

I’m a little confused about the old pellets though, because the name you mentioned is a timothy based pellet that doesn’t have any nuts or seeds in it as far as I can tell?

That’s really odd about the Small Pet Select pellets, definitely worth mentioning to the manufacturer.

Switching pellet brands can cause issues, even when the formulas are similar. Is he still having soft poops?

It’s OK to feed an alfalfa pellet for the first year, but some people like to transition to timothy pellets around 6-7 months. He definitely should transition to timothy hay though, because he doesn’t need alfalfa in more that 1 source.

There are causes of soft poops and diarrhea that aren’t due to diet (like parasites, for example), so if he is still having symptoms I think it’s time to go to the vet.

So you’re transitioning from Timothy pellets to Alfalfa pellets? If you’re unhappy with the quality of the old pellets I would switch him to Oxbow adult pellets at this point. What breed is he? At his age he doesn’t need Alfalfa at all, unless he’s a giant breed, once they stop growing there’s no need for Alfalfa anymore. Eating both Alfalfa hay and Alfalfa pellets is likely too rich of a diet for him, even as babies they only need one source of Alfalfa, either pellets or hay.

Hazel makes a good point. A rich diet (alfalfa-based) can cause excess cecotrope production. Sometimes this isn’t really an issue and will resolve once the bunny is transitioned to a grass hay-based diet. However, some bunnies can get excess cecotropes that are mushy and it can cause poopy butt.