We have two 12 week-old kittens and a middle-aged uncastrated dwarf bunny. For the past few weeks, we have been introducing our bun to the kittens. There has been some intermittent grooming from both sides. Yesterday, we noticed a kitten kneading and licking the bun towards the back of his body. Today, I realised the kitten is sucking, not licking, while kneading. Right where nipples should be, so it seems like it is trying to feed. Bun just sits there.
Now, I have googled this and can find nothing so I am asking here. This could indicate the cat thinks the bun is its' mum, right? Is this a problem? Should we discourage this or not worry about it?