I have a 9lb minpin, she loves to eat weeds outside, I'll walk her and she'll sniff on some weeds than swallow them before I can stop her. We sometimes let her out in the backyard and she just eats them like crazy, I've tried standing there with a water hose and spraying her everytime she gets close to eating some weeds and regardless of how many times I soak her, she'll keep trying to eat them, I only tried that once though, I dont have the patience to do that every day. Any suggestions? She will throw up after she eats alot of weeds.