As it has been mentioned above, as long as your dogs aren’t lactose intolerant then I don’t see the problem in feeding it to them. Definitely start the amount off small since kefir can be quite concentrated in good bacteria so giving their stomachs a chance to get used to it is always advisable.
I started making it myself a good few months ago and also started my dog on it too. He loves it and it does seem to have made a difference despite what my boyfriend says haha!
I read some articles which may help you based on dogs and kefir and also making kefir in general.
