I am going through the same thing with Otis - I too tried the Vegas Stew but it added weight 2 lbs in one week. What my vet recommended was a lower protein kibble - Fromm has a very high protein content, he wanted Otis to be on something 26% or under. I made the switch to Blue Buffalo which is at 24%, he is on the salmon and sweet potatoe. One of the other things I was doing wrong was giving him coconut oil which put added calories into his diet. So now this is what he gets:
1-1/4 c kibble in the am and the same in the evening, I may even have to slash that
He can have ALL the fresh broccoli he wants (per my vet) I said even an entire head and he said yes, if that will make YOU feel better....lol He say's he's not going to starve.
Also he can have no salt, no butter popcorn - it provides a good taste so he thinks he is getting quite the treat as well as it fills him up.
Good luck - I did get 2 pounds off Otis which is a good start but I give him little itty bity snacks now and then which I shouldn't (dinner scraps whicle I'm cooking etc) I just got scolded last nught from my hubby not to do it anymore.
I also take Otis out every evening and he runs the snow blown trails in our yard like a madman for some much needed excercise.
Best of luck to you and remember (and I have to do the same) it's all in OUR heads that they are starving - they will survive....even with those big sad brown eyes looking toward us like they are wilting away. My husband and vet say...look at him, does he look like he's starving and I have to admit, he does not.