Continue writing the next sentence in this paragraph:

How to treat tapeworms in ferrets
Check your ferrets for fleas.
Your ferret can get tapeworms by swallowing infected fleas. If your ferret is scratching, comb through his fur with a fine-toothed flea comb, which is available at your local pet store.
Focus on the area between his shoulder blades-this is a popular' flea' spot on ferrets. If you don't see the actual fleas, you may see their residue, which is dark black.