I know he's bonded with Faith, but saying "that's his baby" is bollocks. It's an animal he's taken in a month ago and neglected to seek appropriate care for her by listening to idiots on tiktok rather than following the advice of qualified vets who have examined the dog, seeking out rescues that have experience with injured sick dogs, researching himself what to do if a sick dog won't eat etc.
The only time I've listened to someone's advice regarding my dog(s) online is from someone I actually knew when it was a minor injury or concern, in the very early hours (1/2/3 am), trusted them because I had spoken to them personally for years, and even then I researched the advice before I would act upon it AND made a vet appointment ASAP if required.