Thinking of Dozer and you and I hope you are having a good weekend. Sending prayers you can find out what is ailing your baby. Another thought if you have houseplants or even since this started a few months ago before winter check outside as well if there are plants poisonous to dogs specifically or cleaning supplies around your property. Sadly we had a member's pet die due to eating the seed of a palm tree commonly used for landscaping and sadly only poisonous for dogs. On that triain of thought you don't feed chicken jerky treats do you? It is sad how many treats and food are being recalled for Salmonella poisoning.
Dog Food Recalls | Dog Food Advisor Recalls, Market Withdrawals, & Safety Alerts snopes.com: Cocoa Mulch Danger to Dogs ASPCA | Toxic and Non-Toxic Plants
Buster sends best wishes and happy tails to Dozer.