you can sell milk for pet use, it's up to the buyer to decide wether it's too good for their dog/cat ?
I like your thinking there
I went and got more goats yesterday, addicted!
They are definitely addictive. Love mine to bits.
I used to sell goats' milk to two friends and always pointed out I was selling it for animal use only, the pretended I didn't hear them say to their small children (one with ezcema and one with a chesty cough), "Here's your Snowflake milk."