hello. I hope there is someone who can\help me.  I have a 16wk old Siberian Huskey.  Over the past 4 wks he has been sick everymorning betwen 4 and 5am.  Its generally just a frothy bile and seems fine straight after.  We have taken him to the vet who has perscribed antibiotics and took blood test.  results of blood tests are inconclusive.  We thought it might be a behavioural issue as he is sick at the same time every morning.  He currently eats a Hillspuppy mix/pedregree breeder mix(50/50). Im hoping there is someone who may have also experienced this who can help me. 

What time is his last feed? It may be caused by his stomach being empty. Try giving him a biscuit or something light (my two get toast) at bedtime.

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At what time do you feed him his last meal? My boy sometimes does this if his stomach is empty, thus I feed mine twice a day. Your 16 week old pup should still be on 3 meals a day at his age. You could try feeding him his evening meal a bit later and see if this helps.