There had been serious cases about the side effects of rimadyl. Side effects can occur in rare situation and might be fatal to a dog. The most common side effects includes kidney, liver, stomach problems.
do you think it has destroyed it though
Welcome...The only way to find out is a full blood panel from your Vet.....The blood test will tell if Kidneys/Liver show any sign of damage.....
The Liver can be repaired, but you must know what your dealing with.....The sooner you can get the bloodwork done, the sooner you will know what to do.....I wish you both luck...Please, come back & let us know what you find out....