Karra and Jade Rothery, from Sompting, have organised a series of events to raise £2,400 for their dog.
Krombie, a Bernese mountain dog, has cataracts in both eyes that need to be corrected so he can see.
Among the events organised by the sisters are a sponsored walk and swim.
They are showing a devotion to Krombie that is much greater than puppy love.
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