My neighbior's dog had the same thing it's called whip worms.It's very deadly.The only med you can get is from the vet.If your dog pees where another dog that has whip worms pee's they get it.Also if your dog steps where the dog that has whip worms peed dog licks it's paw she gets it.It will be in the yard for 3 months.There is no treat ment for the yard that i know of.I would take her to the vet ASAp.I am so sorry.Hope she gets better

She's in our prayers.