Luna lost 0,5 kg - could it be from her diet?

[Sonia59]

It, indeed, looks a bit too much in such a short period of time (it would be 5 kg for a human of 60 kg!), but probably nothing to worry about. Two different scales were used, so you can never be sure.

Peppito has lost ~ 1 kg in 1 year, it was an extra-light diet (the obesity management vet formula from Royal Canin) that really allows to LOOSE weight. There are many other so-called "light" food that are only 10-20% lighter than normal food, and these ones (the most common foods that you can find in most of the pet shops) usually allow to STABILIZE only, not really loosing weight (or not a lot). This is what Peppito has now (also from Royal Canin, for sterilised cats).

What food is it? And of course, it all depends on the cat and the amount eaten. Peppito is always hungry...er...starving, according to what he tells me!

[Craftlady]

I'm not familar with the measuring system of kg's.
Using the measuring system here in the states of lbs (imperial system) loosing 1/2 lb in month is not bad when you have an animal on a diet plan. I find that when they are on diet plan there is more activity which promotes weight loss too.