Hello everyone. We've had a very difficult week with one of our kittens (Guybrush) and I wanted to ask on here for advice. It's quite a long story, but in brief . Both kittens (brothers) were neutered last week. They're just over 4 months old. The operation seemed to go fine, and when they came home they were both fine. We left them sleeping in their beds but then, when our back was turned, they woke up and went a bit crazy. Guybrush had found a (sealed) bag of chocolate buttons, bitten into it and started eating the chocolate - he was found chewing on the chocolate. Shortly afterwards, he got severe diarrhoea and spent the night at the vet's on a drip. He responded well to treatment and came home the next day. He was given antibiotics as there was concern the operation site could get infected. On the vet's advice, he got a light diet of boiled chicken (to which I added a little pumpkin) for a day or two, and then we slowly reintroduced his regular food. Since then, he's been mostly fine (good appetite, drinking plenty) although perhaps a little less affectionate and purry than usual. Yesterday, he had his checkup with the vet, and she did a blood test as there was some concern the chocolate could have caused kidney problems. The test came back with slightly elevated urea and creatine levels (I wish I'd written the numbers down now, I'll need to get them from the vet next time I speak to her). She said there is a slight concern about those numbers, but cats (especially young cats) can recover from this sort of incident given time. She wants to repeat the blood test in a week's time, but in the meantime she suggested we could consider a renal diet. Since then I've been reading up what I can on the topic, but I'm somewhat confused as to what's best. His normal diet is Bozita and Animonda Carny, all of which is consumed with relish. He's not a fussy cat and generally eats anything and everything (this is what got him into trouble in the first place!) When we first adopted them, Guybrush tended to have runny poos, which cleared up when we moved onto higher quality (and grain-free) foods. We don't know for sure if that means he has a grain problem, but it does mean changing his diet risks that happening again. Anyway, the vet sells Hill's k/d and Royal Canin renal foods, in both wet and dry. I realise they can both also be ordered on zooplus. The vet knows my opinion on dry food and suggested the wet form. However, the ingredients lists do not fill one with much confidence: Hill's: Chicken (min. 4%), pig´s liver, chicken, vegetable oils, corn starch, wheat fibre, lamb´s liver, wheat gluten, rice starch, corn syrup, fish oil, calcium sulphate, potassium citrate, potassium chloride, DL-methionine, calcium chloride, iron oxide, taurine, calcium carbonate, L-cystine, iodised salt, caramel, magnesium oxide Royal Canin: Meat and meat by-products (pork, poultry), grain, fish and fish by-products (4% tuna) oils & fats, vegetable by-products, minerals, sugar Zooplus also do: Integra: Meat and animal by-products (15% chicken), cereals, oils and fats, vegetable by-products, minerals. Beaphar: Meat, animal by-products (min. 80% chicken, 5% chicken breast, 5% liver), grains, minerals All of them contain grains (which seems counter-intuitive - you'd imagine that would place more strain on the kidneys). Hill's manages to fit no fewer than 5 grain products on the ingredients list, but that may just be because they are being more specific than "cereals". Apart from Beaphar, all are rather vague on just how much meat they have. The other issue is that the Renal diets specifically contain low protein. My kitten is, at 4 months, just at his rapid growth point, and I'd be worried about restricting his protein intake at this point -- most cats with renal problems are much older and the foods seem more tailored for them. Finally, the one positive thing about the renal diets appears to be the low phosphorous content. However, I have read that you can add a Phosporous binder to normal food to achieve a similar result. I'm not making any changes to his diet right now - I'd rather he continue to settle after all the trauma of the last week and see how his blood test is in a week's time. However, I wanted to do my research so I can ask the right questions of the vet -- what's the general opinion on this forum of the (seemingly poor) renal foods available? Would adding a phosporous binder to his existing food be a better idea? Thanks for any advice or suggestions people can offer.