Unfortunately Bengals are prone to sensitive stomachs, as long as the ktitens are alert and playful I wouldnt worry to much, you could get your vet to check for the usual bengal problems, Giardia, coccidia and trich. I recently spent some time with Dr Susan Little at Bristol University and it is a known problem amongst the bengal breed:(
I wouldnt feed to much tinned food as it is quite rich. You could try slippery elm or canned pumpkin to ease the problem. Another cause is plain and simple, worms!! if you use Panacur this will also help treat the giardia:)
Regards
Dawn
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