Shelby has worms

I was hoping to get the dogs into daycare a couple times a week starting soon.  Megan could use some more socialization and Shelby just LOVES to play with other dogs and is bursting with energy.  One of the requirements is a negative fecal sample so I took those in.  A couple of days later I got a call.  Megan’s was negative, but Shelby has whipworm.  I had never heard of whipworm before.  Apparently, there are no symptoms unless the infestation is severe.  Yesterday I gave them both a one-time dose of Drontal (Megan’s prophylactically I suppose) and they are now switched from Heartgard to Interceptor.  I think the Drontal may have had some side effects for Shelby because she was acting a little weird last night – just whining a lot for no apparent reason.  She was eating just fine and didn’t appear to be in pain. Then later in the evening she was just wild.  It took a while for her to settle down. She was back to normal this morning.  Anyway, I am hoping to be able to get some clean samples to the daycare soon.  Megan is learning to sit when another dog is approaching. She’s doing well except for one particular dog. There is a black lab mix down the block named Sophie.  For some reason, they really hate each other.