Hello!
My name is Betsy we brought our Mrs. Walters home in March. She's a 4 and a half months and we are totally smitten. I've found the forum to be very helpful so far, so I decided to join so I could participate.
Not sure of the size limit, there used to be information about this but I can't find it. I typically downsize to 800 x 600 pixels, 75% quality, and that works well. Size is usually under 100 kb.
Agree with tanza, it's not good to overdo pain meds. An animal that doesn't feel the warning signal is far more likely to cause themselves harm. We want to protect them from discomfort, but at times that is absolutely the wrong thing to do.