Hello Jo, I'm Dr. Deb.
I recently came online and see that your question about Spooky hasn't been answered. I'm so sorry that you've had to wait for a response,but if you still need assistance, I'd like to help if I can.
If Spooky is otherwise acting normally, then I wouldn't necessarily think that she would need to be seen sooner than Wednesday....and that's great that she's doing so well after her trauma.
When it comes to hypersalivation, there could be several different reasons.
1.Problems in the mouth such as an infected tooth, ulcers, abscesses, foreign body. It is possible that a good oral exam will reveal the problem or sedation may be necessary to adequately examine the mouth. Usually, but not always, these cats will also have a reduced appetite or might be pawing at their mouths.
2. Nausea for any reason. Systemic diseases such as kidney disease or inflammatory bowel disease (IBD) can cause cats to feel nauseous. It wouldn't be likely that she has a serious systemic problem but IBD can be seen in any aged cat although it's often difficult to diagnose without a biopsy (understandably something that most owners are reluctant to have done).
3. Ingestion of any noxious substance that they might have groomed off of her bodies (such as flea/tick products) or anything that they might have licked.
4. In very young cats, a liver shunt can cause this problem but while possible, it's fairly rare.
5.Early upper respiratory infection or Calici virus.This virus can attack the mucous membranes in the mouth and create ulcers on the hard palate and tongue; they are very painful. If Spooky starts to sneeze or develop a nasal/eye discharge, then this is fairly diagnostic.
5.Spontaneous.In some cats, we can’t find an explanation and they will spontaneously stop drooling and we won’t have had any idea why they started in the first place.
One option for you to consider for her would be over teh counter Famotidine (Pepcid AC) at a dose of ¼ of a 10 mg tablet twice a day although this drug may be difficult to find in the UK. Another option would be Omeprazole (Prilosec) at a dose of 1/2 of a 10 mg tablet once a day.
I hope this helps and that the excessive salivation resolves in a short period of time. Again, my apologies for the delayed reply. Deb