I have a cat, he is 7 yrs old. Yesterday I found a lump on his neck between his shoulder blades it does not hurt him, he is eating and drinking, he has been drinking more since 3 days ago and I noticed the lump on his neck last Sunday two days ago, the lump is hard. He plays and is very lively just as he has always been but I'am worried about him. Could you tell me what this is? Please
