Hartz flea control – hair stopped growing, lesion

Last June I put Hartz flea control on my dog’s back. To be fair, it was 1 year old, and he had no problems when I used it the previous year. Now the hair on his back will not grow where the Hartz was applied. He also has a small growth that was bleeding in the same region.

Be warned; if you must use Hartz, do not save it. Throw it out.

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