I know this is an old thread, but the topic is of immediate interest to me since I lost both my geese over the past three days. in Both cases, the geese were in a fenced pen. I lost the first one at about 10:30 pm from my lower meadow- three feet from the swamp. The other was attacked in the upper pen, 300 ft away from the swamp, also around 10:30 pm. Since it was closer to the house, we were able to scare it off. the goose was clearly injured, but I couldn't catch her to see how bad. I was able to get her into an old hutch. early this morning I went to check on her and found that her back had been badly torn. her whole spinal column was visible and I could see her heart beating. I had to put her down.
I know that it is the otter because of the tracks at the first kill, and we've been seeing the otter and her 5 pups in the swamp. I had no idea they were such ruthless predators. Last summer I lost 5 hens in three days to otters, but who knew they could kill geese?? My hens now live in their fort knox pen all the time. I only wish I had something similar for geese.