Development of a vaccine against feline enteric coronavirus infection to protect against FIP (morrisanimalfoundation.org)
Because when shelters learn through diagnostic testing that they actually have canine respiratory coronavirus and not Bordetella or some of the more traditional pathogens causing a spike in their kennel cough cases, they go to their vaccine distributors and start ordering the DAPP with killed canine enteric coronavirus in it, thinking they'll add that to the armamentarium of preventive vaccines to give at admissions. (sheltermedicine.vetmed.ufl.edu)
Pretty much all of the information that I can find on feline coronavirus infection indicates that enteric coronavirus in cats causes a short term illness, usually with diarrhea as the major clinical symptom, lasting about three to five days. (vetinfo.com)