Swapped the boys to raw, all going great besides Novak seemingly being allergic to liver. It's a bit confusing, I'm feeding DAF minces and I believe the chicken ones have chicken liver in then, which he's been 100% fine with. He's always thrown up any form of liver he'd had in the past, but with him being great on the minces I picked up some liver, washed it and gave them a tiny amount this morning (gave him it before his morning feed just in case he brought it up), sure enough twenty minutes later it was back on the carpet, he didn't try to eat it again or anything, just had some water and went for a lie down. Bailey was fine thankfully. Gave them breakfast an hour later, which went down great, as usual. Now, since I'm new to raw I've read a lot saying liver is very important, so what can I do now? Since it doesn't seem to agree with Novak. Is there anything else I can give him instead?