Hi Mrs. Heath, We are so sorry to hear that your little one has not been feeling well (and the concern and stress this causes for you also). Please note that I am NOT a medical expert or professional. Everything that I am sharing and that you consider trying should be run past your veterinarian first.
Some things I would consider based on the above...food allergies can make a cat throw up, changing foods too quickly can upset the digestive tract, too much hair in the system can cause soft stool, diarrhea can lead to dehydration and that can cause nausea. So one thing can lead to another.
Did they discuss food allergies with you? They may have ruled this out based on when-timewise- she vomited after eating.
Changing foods should be done gradually-whenever possible-we generally exchange the new food 10% every three days till it equals 100% or whatever the desired percentage is. This helps to avoid diarrhea etc.
Did the Dr. give your cat fluids (from a bag and with a needle inserted under the skin)? You can try to gently pull up on her fur at the scruff/shoulderblade area-it should bounce back immediately (snap back into place) if she is not dehydrated. If she is dehydrated it will sluggishly go back into place. This is not always easy to determine thou. Fluids can truly make a big difference, we have experienced this many times.
Brush, brush, brush her hair. Daily. They can ingest so much hair! Some cats will throw this up, and it wreaks havoc with others.
A few other things that you may want to ask your vet. about...Plain Kaopectate for diarrhea (it is a VERY small dose given orally with a thin syringe- a syringe without the needle). They can show you the dosage to give right on the syringe itself. This has worked quickly and well for us.
Fasting for 24 hours (if your vet. gives the OK)...can give her body a much-needed rest. Plenty of fresh water but no food or treats at all.
Using a pill shooter, requesting an oral version of the meds she is taking now, crushing and mixing with a small amount of can cat food or hiding it whole, may be easier options to choose from. But if you can get the meds down as is, although not pleasant, you can give her a reward each time afterward. It can help. Such as brushing or playing-whatever she likes best.
Praying all goes better soon!
Sarah, AdoptPetsLocally.com
#PetHealthandNutrition