I posted this in your other thread, but I’ll copy it over here as well:
My vet has ALWAYS prescribed a probiotic whenever there is an antibiotic being given. You give them at different times (read your directions or ask your vet) so they are not cancelling each other out. The antibiotic gets in their system, and then the probiotic “jump-starts” the dgestive system again. Rabbit’s digestive systems are SO dependant on gut bacteria that they don’t want to knock things out of whack, especially in a bun that is already sick.
With the pasteurella, Pepper was on an off antibiotics for more than 8 months, and NEVER had any tummy issues – I credit that to the probi. I would give Pepper her antibiotic with her greens when I got home from work at 6-ish and then she got her ProBi at around 8:30 with her pellets and then again in the morning with her other pellets.
My probi was a liquid and she got 2 small doses per day – I would just put it on her pellets and she never noticed. The antibiotics I would smush up in a blob of applesauce or canned pumpkin and she pretty much inhaled them – SO Much easier that trying the syringe method.