I have a 5 year old cat and recently he's been so hungry all the time. I thought I was worms so de wormed him and its done nothing to his appetite. I feed him wet and dry food but he,ll eat it and instantly want more. He constantly crys for more food! He is more of an outdoor cat but does stay home alot too, he's not overweight I think he's lost weight which made me think worms so got that sorted. Don't know what else it could be??