It may be caused by excessive infusion. Feline distemper can cause vomiting, diarrhea, and bloody stools in cats, which will cause a large loss of body fluids, so cats will show symptoms of dehydration. The treatment of feline distemper must be through infusion. If only crystalloid is given If too much fluid is infused, symptoms of edema will appear. Colloidal fluid can be infused to improve the symptoms of edema in cats.