My puppy came home on subq fluids as well, I think my vet trusted me as well.. no food for 24 hours , introduce small amounts of boiled chicken and rice back into her diet.. little bits a several times a day for the first fews , I kept her on chix rice for 10 days the last three I put her NEW kibble in it.. I went with low fat..12% My vet didnt feel I needed to change her diet at all she said she felt it was something she got into or the coconut oil I was adding to her food. She is still on low fat kibble because I never want to deal with that again..it scared the daylights out of me