Re: Urgent advise needed!
New food needs a gradual introduction and change over or it can upset the tummy.
If you have any old type then give him that then start adding about an eigth new to the old and gradually increase the percentage till you are on completely new type over about 3 weeks always monitoring how he responds.
Try and keep him calm and leave him be overnight and see if he settles. If not then you should see the vet.
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