Des, what makes you think it's an otter? Have you seen them in your pond? The reason I ask is because I too have CC that have marks on their heads ranging from white colored abrasions to what looks like actual raw meat showing. I was wondering what was causing it but haven't noticed any varmints.
2011 five acre pond. LMB, SMB, HSB, SPB, BG, CNBG, HBG, RES, WM, CC, BCP, GC, FHM, GSH
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