Q. I have a Queensland heeler pup that is 12 wks old and have wormed him 2 wk ago .he yelps and bites at his rear and tail without any warning

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A. He may need a follow up deworming. It's normal practice to deworm and then treat again about ten days after.

Most wormers kill only The worms and not the eggs. So the second treatment is needed to kill the newly hatched worms before they have the chance to reproduce again.

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