Hi all
Apologies for not getting back here sooner. I've had some busy days and the time has just whizzed past. However, I very much appreciate all the suggestions and links on here and I have managed to read many of the links.
I saw the Vet Nurse yesterday (without my cat, tho, as it's rather traumatic for her to be caught and put in carrier etc. Long story but they both had an incredible difficult start to life before being discovered and put into the care of Cats Protection - where I adopted them from at 5 months old)
So, the vet nurse and myself had a very long discussion - approx 1 hour, to be honest !!! Needless to say, her views are based on those of the surgery and promote Royal Canin so I'll say no more on that! However, I did explain how I was looking into low carb or prey-model diet etc and also explained why etc and she was clearly holding an open mind. She said she would like to look into further, as she agreed it did sound sensible etc.
So, for now I'm going to change her current diet more over to wet food, and a different pouch food, gradually, of course. I still feel both my cats would ultimately benefit from a more natural diet and am looking into the prey-model to see where/how to get the food, how much it will cost etc. I feel I will likely change over to this style of food quite soon, to be honest, but I need to be sure I fully understand what I'm doing first. I see no reason to suggest my cats may have issues eating the raw food, although will be introduced gradually. They certainly chomped well on some raw chicken I bought yesterday, cut into inch cubed pieces. Again, I suspect they may have been weened on wild birds and mice!!!
I have a lot more reading to do before finally embarking on this new feeding regime but I'm sure it will solve the weight problem in a much better and healthy manner.
Please feel free to post any further advice or suggestions (particularly where to source this food type) as I'll always be happy to increase my knowledge etc. I always like to learn new things, although my memory often fails me too much
Again, many thanks to you all