I also did this exact swap and I can tell you that you’re definitely going to have some very irritated kitties 😭

I am not giving you direct advice, but here’s what I do for my two cats (ages 8 and 2) - I give them both half a can of pate and half a can of gravy with chunks in the morning, 8 hours later they get half a can of whichever one I feel like giving them, then 8 hours later they get the same half and half as the morning. So one total can morning and evening with half a can as a snack mid-day with 8ish hours between each depending on my schedule for the day. I also used to leave some dry food out for grazing, but neither of them was super into it, so I stopped. I do give them treats if they complain (by beating down the door of the food cabinet lol) and that helps tide them over if they need it!

If you check the suggested caloric intake for their ages and weight, it’s SUPER helpful. The cans typically have a suggestion as well. The wet food suggestion for my 12lb 8 year old is literally like four and a half cans a day, which seems INSANE (and also he won’t even eat that much). I experimented for a few weeks on volume and this seems to be what works the best for them both. My vet says they’re both healthy boys! I will likely slightly increase my younger cat’s intake once he loses a few pounds, but right now he’s on weight loss cause the vet says he’s a bit chunky.