Agree it’s not nice seeing them fighting over the cucumber. It would have been better to put put out a large dish with lots of cubes in so they could feed round it and have one each. I’ve seen how Souffle puts out a dish full of veg for litters.
Nothing wrong with cucumber skin I think - I’ve always left it on
. I have to say one bit did make me laugh - when the Mother had a slice and a baby wouldn’t let go of it. But I take your point it was done for entertainment value and perhaps not a good example of how to feed veg to a litter.