Some of the signs to watch for are thread, string, or yarn hanging out of the mouth or rectum; vomiting combined with history of playing with thread, string, or yarn; and loss of appetite with those signs.
If your cat has swallowed thread, string, or yarn, use the following cat care tips:
Step 1: Approach the cat carefully. If your cat is nervous or anxious, restrain the cat if necessary.
Step 2: If nothing is visible, proceed to Step 3. If thread, string, or yarn is hanging out of the cat's mouth or rectum:
Step 2a: Pull on the material lightly. If you feel resistance, stop. Do not continue to pull the material.
Step 2b: Cut off the material as short as possible and proceed to Step 3.
Step 3: Give the cat one tablespoon of white petroleum jelly. Using a small amount each time, rub the jelly on the cat's mouth and paws. The cat will lick it off. Do not give the cat mineral oil.
Step 4: If vomiting occurs or the cat stops eating, transport to the veterinarian immediately.