The biggest concern I have is a saddle thrombus - a large blood clot that has lodged at the end of the aorta and is blocking blood flow to the hind limbs. If this has occurred, you should take your cat to the vet immediately.
Twitching in your sleep can be caused by:StressTirednessEye strainCaffeineAlcoholDry eyesNutritional imbalancesAllergies
Typically neurological problems will cause head twitching in children. This twitching could be helped or cured by certain prescribed medications.
could be gas due to irregular digestion or pregnancy
Both the crying and the twitching could be pointing towards a painful injury of some kind. See a vet!
Twitching, little muscle spasms, could be caused by dehydration and lack of calcium and potassium. No matter what the cause, a physician should address this problem. If the twitching is painful, it may be some type of inflammation in the nerve or neuritis.
check your wheel bearings
Don't panicccc!!!!!! It ciuld just be stress or migraines!!!! If you have neck artheritis it could be this is the cause!!!! Go see a doctor fast
The black rat snake may be sick if they are not responding and twitching on the ground.
A cat purrs when it is happy. The opposite could be "growls" (the same kind of sound) or "hisses" (also expresses anger).
It could be POTS. Go to dinet.org for more information on it.
If panting is for long time see your vet. She could be having complications.
There are a number of things that could cause your twitch on the right side of your head. It could be a nervous twitch for example.