[C4D]

My own vet is very much in favor of probiotics and it has now become a bit of a mainstream medication in both human and canine practice. If it only happened once, it might have been some other issue. You could start with a lower dosage, say 1/2 the actual dosing amount and see what happens. I use Kefir and give my various dogs 1 tsp – 1 tbsp daily depending on size. It’s 99% lactose free, much cheaper, contains all natural probiotics and has worked well for me.