What it is
Potassium helps nerve signals reach the muscles and helps the muscles contract. When its level in the blood falls, muscles weaken all over the body, and weakness of the neck muscles stands out above all: the cat seems to stare at the floor all the time.
Potassium can fall because of other diseases, such as kidney or hormone disorders, or because of long-lasting vomiting or a poor appetite. There is also an inherited form, in which bouts of weakness keep returning from youth.
Between episodes a cat can look perfectly healthy, so it is worth noting down when the weakness comes on and how long it lasts. If the weakness reaches the breathing muscles, breathing becomes hard, and that is not something to wait out.
Signs you may notice
- Head droops, chin to chest
- Stiff walk with short steps
- Avoids jumping
- Soon lies down
- Sudden weakness
- Struggles to breathe
A cat lets its head droop with its chin almost on its chest, walks stiffly with short steps, avoids jumping and soon lies down. The weakness can come in episodes and pass again.
When to see a vet
If your cat suddenly weakens, cannot lift its head, cannot walk or struggles to breathe, a vet is needed immediately. Even if an episode was mild and has passed, book a check-up soon.
This is general information, not veterinary advice. For your own cat's health, tests and treatment, see a vet.