Hey
I’m new to this forum and have been grateful for the multitude of information on here. It seems to be a very good place 
That said, I have 3 cats. Every one of them is from a rescue situation and everyone of them is unfortunately heavily overweight, because the first 2 years of their existence in my life I was working for an Airline, out of the house 16 hours / day and the cats had free choice kibbles, supermarket brand. Because I didn’t know better. I was completely shocked and blown out of my mind, when an acquaintance decided to become Vegan and then decided for her animals (dog and cats) to become Vegan as well.
I told her that a pure plant diet is most likely going to kill her cats. She didn’t believe me, so in order to prove my points began researching the topic of really feeding cats.
And learned a TON of things that I had NO clue about before. And no, you cannot feed your cats Vegan.
Now, 6 years after the fact, my cats are 8 years old, not nearly as Obese as they were and only get holistic wet food (1 can / day / cat - TikiCat, Natural Balance, EVO, Grammy’s, etc. and of all of those the Grainfree versions) and about 10 kibbles in the morning and 10 kibbles at midnight. (Orijen, EVO) The reason I feed 3x a day a minimum amount of kibbles is to keep a routine for them. They are outdoor/indoor cats (free choice through a catflap) and know the feed times. This way, I have them in the house at least 3x a day and can check up on ticks, injuries, etc.
They did really well on this and lost a ton of weight until - unfortunately - one of the neighbours started feeding as well. I have not yet figured out who exactly it is, but the constant gain of weight again, the regular skipping a meal here or there and not coming home for a full day gives it away quite clearly.
I am quite mad, but so far, addressing the neighbours hasn’t helped and I have not found anyone guilty
(everyone says it’s not them) …
I’m considering switching over to splitting the cans to 2x / day and skip one feeding entirely… but that doesn’t eliminate my neighbours and I have no control over WHAT they eat out there…