The right flank lump could be a herniated abdominal lump or abscess
Channel: Dr David Sing
Date: 2015-08-11

Around 2 to 3 months of the flank skin swelling. There could be an abscess which had ruptured partially, but now has had hardened and palpable. 

It could be a hernia, an opening from the abdominal muscle. The owner is advised to wait and see.