Hello, thanks for your question today! I am Dr. Drew, and I am a licensed veterinarian. I'll be happy to help you in any way I can.
The signs you are describing, are definitely NOT typical with the use of Metacam.
more commonly, side effects include digestive irritation,
including vomiting or diarrhea,
but I would be more likely to suspect some other type of issue causing Daisy's issues, as you have described.
the signs you've described would make me consider some type of issue within the brain, possibly associated with a temporary decrease in blood flow, as might be seen with a stroke type of event.
it appears that you are offline,
please let me know if more information is needed when you return.