Just took puppy to vet today for 1st vaccination/anti-parasite, now she's pooping worms I'm not sure if this is an effect of the medicine and she is just getting rid of these things or what but her poop is filled with really, really long roundworms. She has pooped three times with them in it. I didn't even think she had something like that cause she isn't thin and seems so healthy. Is it normal for puppies to poop the worms out after the anti-parasite medicine or could something have possible been eaten today by her that I didn't notice that caused this?