For some months something, we assumed another cat, has been coming through the cat flap and eating any left-over foods from our cats' bowls during the night.
Anything else edible left out on the counter has also been eaten.
I have two elderly cats who don't seem at all upset about this.
This morning these two bits of brownish fur, complete with skin, were on the floor. Our cats are black.
We live in a rural area with few houses nearby.
Any ideas?
(I have asked Santa for a new posh cat flap with entry via electronic collers for Christmas) 