Our 1-year old mixed breed rescue Brownie Bear was just diagnosed yesterday with EPI...

We don't know our dog's breed - we think he is likely a combination of border collie, kelpie, & flat-coated retriever. He just turned 1 earlier this month. We fostered him from ~7 weeks old from a local humane society. He was a VERY sick puppy & had distemper, parvo, & a bacterial infection. But, the little guy was a fighter & made it through and we officially adopted him when he was ~5 months. Because all of the antibiotics wreaked havoc on his GI tract, he was placed on a GI prescription food in May 2024 and was the epitome of health until November 2024. We returned from a 2 week vacation to find him with terrible diarrhea & super skinny (he was 35 lbs, but 42 lbs & buff when we left)... and with constant leakage of a yellow greasy substance from his anus. Initial fecal & bloodwork (that didn't test pancreatic values) came back squeaky clean. So, our vet presumed that it was a food intolerance or sensitivity. Or imbalance of flora. So, tylin + probiotics + new prescription diet was prescribed. And then metronidozole + visbiome + prescription diet (all of which are high fiber by the way) - which now we understand are the worst for EPI. Fast forward 2 months and we've been through 4 different foods & 2 different vets... we fired our first one when her recommendation was to do an expensive ultrasound rather than order a more specific blood test to look more closely at his pancreas. I have had him on a bland diet of ground turkey & potato for the last 2 weeks. After this diagnosis yesterday, our new vet recommended shifting the ratio to 75% meat/25% potato, but this is not sustainable for his health or for my sanity to make homemade food (I work & have 3 small children). Stool not even close to normal, but at least brown which is a step in the right direction.
And the timing of this diagnosis couldn't be worse... we are going to be out of the country for 10 days starting next Friday & I feel terrible for putting this on the dogsitter... Gah!
So, here's what I've got so far... with questions embedded.
- ENZYMES: I ordered Epizyme and am waiting for that to arrive. I will look more closely at Enzyme Diane because I see that many people on this forum use that product. But I just wanted something fast through Chewy (& more affordable than Viocase which my vet initially recommended). Can anyone explain the difference between 6x & 8x? - We're continuing with the RxZyme supplement our vet gave us a week ago just to bide us over. But I am going to try to find some porcine pancreatin from a health store this morning to introduce that ASAP while I wait for the Epizyme to arrive.
- B12: I picked up 8 B12 shots yesterday from our vet, which we will administer weekly. And ordered coballaquin and will give that to him daily as well.
- PRE/PROBIOTICS: Also continuing Visbiome daily (since I bought a 3 month supply). Do you think that we should ask our vet for another prescription of Tylin? Even though he had both that & 2 courses of metronidazole a month ago? I also just ordered some slippery elm powder.
- DIET: I just cannot wrap my head around continuing to make him homemade food as well as the enzyme supplementation. I am already stretched super thin... I would sincerely appreciate recommendations for store-bought options that have worked well with your pups. I understand the requirements, but this would help me to shorten my stroke & start trialing new foods when we return from our trip.
- HAIR LOSS: recommendations for supplements and/or oils that have helped with itchiness? he has lost some hair around his eyes from scratching.
SO, SO, SO APPRECIATIVE of any and all insights & advice.
Rachel