If the battery shows less voltage or won't take a charge, it's time to get out the hydrometer. This device checks the proportions of sulfuric acid and water in the electrolyte, which is a precise indication of the level of charge.
Common causes of cat hair loss, or alopecia, can range from allergic reactions to hormone imbalances to an infestation of some pest or another. Although the different causes can be difficult to pinpoint, most are fairly easy to address and remedy.
Sign of Hairballs. Believe it or not, throwing up foam could be due to hairballs. Cats get hairballs when they swallow hairs during their grooming duties. According to Diane Stein, author of The Natural Remedy Book for Dogs and Cats, if you notice your cat vomiting foam that doesn't have any hair in it, hairballs could indeed be the culprit.