The best sign of a dehydrated cat is to pull on the skin on the back of its neck (the scruff). In a hydrated cat the skin will immediately spring back, but if the cat is dehydrated the skin will go back to normal a lot slower.
Unfortunately, cats are notoriously bad drinkers, even when they are thirsty. This is because they have evolved to get all their needed moisture from their prey (their ancestors were cats that lived in very dry and arid environments where water was hard to come by).
In really severe cases, losing weight and a cat that begins to drink a ton of water is a sign of Diabetes or life threatening kidney failure.
shivering
Yes. Both shivering and a rapid heart rate are signs of dehydration.
dehydration
No, it can be a sign of dehydration/too much iron.
Same thing as humans: through lack of water.
dehydration
Candle wax leaking from the head of your penis and/or your vagina is a serious sign of dehydration. To prevent this, always use lubricant, such as car oil, during intercourse. YOUR WELCOME <3
blue fingernails
No. It's a sign of hunger. It could also be a sign of dehydration. Make sure you're drinking plenty of water.
No; smelly urine is caused by dehydration, as is the yellow color
No, this can be a sign of dehydration and should be checked out by a doctor.
When cats wink as a sign of affection. It means I like you...feel flattered ;)