Hi Lisa sounds like he has bad stomach acid, I give Patch 4 smaller meals a day & at night about 8.30pm before he goes to sleep I give him 1/2 a rice cracker biscuit just to line his stomach thru the night also Patch was put on 1/3 Zantac every 12 hours 1/2 hour before food for his yellow spew, this did stop the spewing yellow bile of a morning, I think you have Pepcid in America just google the dose for dogs, I’d give him some Pepcid before bed & before he eats of a morning & see if things get better, I also have tried the Nutro Chicken & rice as it was close to the Eukanuba Intestinal formula & it gave Patch Stomach acid, so I stopped with the Nutro his poos were ok but he kept swollowing & swollowing then would spew, I thought it was cause the fat was 13-15%.. Fat can cause acid reflux & make matters worst, when you try a new food do it so sooooo slowley, I take 2 -3 weeks when I introduce a new food to Patch, first you need to stabilize him on 1 food & let his tummy & bowel heal then go from there, Patch was just on his vet diet for 4-5months to settle everything down then I started to re-introduce him to new kibbles & finally we got the Wellness Simple range in Australia, Holistic Select which is also made by Wellpet make a Grainfree Puppy Health Salmon Anchovy & sardine meal recipe the fat is 13%..in Brown pink & white packet, its suppost to be good for their digestion & has pumkin..
