Well you can't be too careful with a 'lump' afterall it can be either something insignificant or something very serious.
You will need to get to the bottom of it one way or another. In particular because this is a younger dog.
Most senior dogs develop insignificant little old age tumors and growths. BUT you're dog is yound and you should do what you can to find out.
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Cats only have nine lives because they stole them from dogs!Teehee
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