[crazy4cats]

Hi Akari-
The 16 strain one looks like a great deal. Appears to be buy one get one right now. That sounds right up your alley! It contains prebiotics as well. I would think that would be a good choice. The other one with grapefruit extract, looks good, but would do a little research on that ingredient. I’m not sure if it is recommended for dogs or not. Good luck.