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Its been raining a lot this year and its created a big tick problem.  I have a puppy that goes out and comes back with some every time which I pick off immediately.  I have treated them and have been removing as many as i can.  He just came in with something on his head that looked like dirt but when I brushed it off, it was stuck to him.  Are these tick eggs? I treated him for ticks and Im unsure what to do.  Should I wash him, let the medication work or what?  What do tick eggs look like?