Yoghurt drops are not good, but a small amount for an otherwise healthy bun won’t cause significant damage. Dairy is not recommended for buns that have been weaned, and the drops contain sugar. Of course if a bun is feed yoghurt drops often, it can be a health hazard, especially if the bun gets to fill up on treats so it doesn’t eat enough hay.
I think you can just stop the yoghurt drops and try some bunny appropriate treat instead. Oxbow has several varieties, both baked and dried, Supreme Selective have sticks and loops with a high fiber content. If you read the ingredient list on the packs, I’m sure you can find sth that is reasonably good. (Reasonable, because treats are after all treats and should only be a small part of a healthy diet- exactly as is the case for children and dogs).
You want to avoid dairy, a high percentage of fat, and excessive amounts of sugar/syrup/honey.
Small pieces of fruit or a dried cranberry/raisin can be used as a treat.
Its sad that pet stores sell yoghurt drops for vegan-type animals such as rabbits and guinea pigs. I guess it is simply because it’s easy to sell and cheap to produce. All of us like to give our buns the occasional treat, (rabbits do love their treats!) and the word yoghurt has a “healthy” ring to it.
I’m glad you have found out that yoghurt drops are not the best thing for a rabbit, but I dont think you need to be worried about your bun’s future health.
I’m happy that you chose to post about this, because there are no laws that prevents pet shops from selling inappropriate bunny food and treats. Awareness among bun owners is crucial. If we stop buying the harmful products, they won’t generate profits to the stores.