Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to diagnose and treat feline injection site sarcoma [title] Watch for a growing lump. [step] A small lump is normal when a cat receives an injection. However, if it grows bigger over time, that is cause for concern.

Ending1: Or, if it looks threatening, it is too small to be a result of surgery and its presence needs to be seen by a veterinarian. [title] Check for discomfort while injections are administered. Ending2: Moving closer to your cat will make the lump smaller. It could also bulge as you move closer to your cat. Ending3: Take your cat to the vet if you notice the lump is getting larger, especially if it continues to grow 1 month after the injection. [substeps] The lump will likely be fairly hard and not move around that easily. Ending4: In addition, an enlarged lump might be a sign of multiple vet-related changes, such as ulcers, blockage of the mouth, and a flattened rectum. In addition, you can notice other symptoms, such as loose or labored breathing, or an abscess forming in the mouth, which may indicate more serious issues with the parasites.

Answer format: ending1/ending2/ending3/ending4